diff --git a/CHANGELOG.md b/CHANGELOG.md
index f745a373..8ba0df49 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 - Flip writing order of effect colour blocks every other block write to try
   and even out. Previously the bottom rows were always last to be written.
+- Add more examples: ball, comet, pulser.
+- Refine the keyboard layout grid for GX502.
 
 ## [0.9.4] - 2020-05-05
 ### Changed
diff --git a/aura/examples/ball.rs b/aura/examples/ball.rs
new file mode 100644
index 00000000..5a359b14
--- /dev/null
+++ b/aura/examples/ball.rs
@@ -0,0 +1,94 @@
+use rog_aura::{AuraDbusWriter, GX502Layout, Key, KeyColourArray, KeyLayout};
+use std::collections::LinkedList;
+
+#[derive(Debug, Clone)]
+struct Ball {
+    position: (i32, i32),
+    direction: (i32, i32),
+    trail: LinkedList<(i32, i32)>,
+}
+impl Ball {
+    fn new(x: i32, y: i32, trail_len: u32) -> Self {
+        let mut trail = LinkedList::new();
+        for _ in 1..=trail_len {
+            trail.push_back((x, y));
+        }
+
+        Ball {
+            position: (x, y),
+            direction: (1, 1),
+            trail,
+        }
+    }
+
+    fn update(&mut self, key_map: &Vec<[Key; 17]>) {
+        let pos = self.position;
+        let dir = self.direction;
+
+        if pos.0 + dir.0 > key_map[pos.1 as usize].len() as i32 - 1 || pos.0 + dir.0 < 0 {
+            self.direction.0 *= -1;
+        } else if key_map[(pos.1) as usize][(pos.0 + dir.0) as usize] == Key::None {
+            self.direction.0 *= -1;
+        }
+
+        if pos.1 + dir.1 > key_map.len() as i32 - 1 || pos.1 + dir.1 < 0 {
+            self.direction.1 *= -1;
+        } else if key_map[(pos.1 + dir.1) as usize][(pos.0) as usize] == Key::None {
+            self.direction.1 *= -1;
+        }
+
+        self.trail.pop_front();
+        self.trail.push_back(self.position);
+
+        self.position.0 += self.direction.0;
+        self.position.1 += self.direction.1;
+
+        if self.position.0 > key_map[self.position.1 as usize].len() as i32 {
+            self.position.0 = key_map[self.position.1 as usize].len() as i32 - 1;
+        }
+    }
+}
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let mut writer = AuraDbusWriter::new()?;
+
+    let mut colours = KeyColourArray::new();
+
+    let layout = GX502Layout::default();
+
+    let mut balls = [Ball::new(2, 1, 8), Ball::new(4, 6, 6), Ball::new(12, 3, 4)];
+
+    writer.init_effect()?;
+
+    let rows = layout.get_rows();
+    loop {
+        for (n, ball) in balls.iter_mut().enumerate() {
+            ball.update(rows);
+            for (i, pos) in ball.trail.iter().enumerate() {
+                if let Some(c) = colours.key(rows[pos.1 as usize][pos.0 as usize]) {
+                    *c.0 = 0;
+                    *c.1 = 0;
+                    *c.2 = 0;
+                    if n == 0 {
+                        *c.0 = i as u8 * (255 / ball.trail.len() as u8);
+                    } else if n == 1 {
+                        *c.1 = i as u8 * (255 / ball.trail.len() as u8);
+                    } else if n == 2 {
+                        *c.2 = i as u8 * (255 / ball.trail.len() as u8);
+                    }
+                };
+            }
+
+            if let Some(c) = colours.key(rows[ball.position.1 as usize][ball.position.0 as usize]) {
+                *c.0 = 255;
+                *c.1 = 255;
+                *c.2 = 255;
+            };
+        }
+
+        writer.write_colour_block(&colours)?;
+
+        // can change 100 times per second, so need to slow it down
+        std::thread::sleep(std::time::Duration::from_millis(60));
+    }
+}
diff --git a/aura/examples/comet.rs b/aura/examples/comet.rs
new file mode 100644
index 00000000..f1352335
--- /dev/null
+++ b/aura/examples/comet.rs
@@ -0,0 +1,29 @@
+use rog_aura::{AuraDbusWriter, GX502Layout, KeyColourArray, KeyLayout};
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let mut writer = AuraDbusWriter::new()?;
+
+    let layout = GX502Layout::default();
+
+    writer.init_effect()?;
+    let rows = layout.get_rows();
+
+    let mut column = 0;
+    loop {
+        let mut key_colours = KeyColourArray::new();
+        for row in rows {
+            if let Some(c) = key_colours.key(row[column as usize]) {
+                *c.0 = 255;
+            };
+        }
+        if column == rows[0].len() - 1 {
+            column = 0
+        } else {
+            column += 1;
+        }
+
+        writer.write_colour_block(&key_colours)?;
+
+        std::thread::sleep(std::time::Duration::from_millis(250));
+    }
+}
diff --git a/aura/examples/iterate-keys.rs b/aura/examples/iterate-keys.rs
index 60cccd9c..152bb728 100644
--- a/aura/examples/iterate-keys.rs
+++ b/aura/examples/iterate-keys.rs
@@ -11,29 +11,39 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     loop {
         for (r, row) in rows.iter().enumerate() {
             for (k, key) in row.iter().enumerate() {
-                *key_colours.key(*key).0 = 254;
+                if let Some(c) = key_colours.key(*key) {
+                    *c.0 = 255;
+                };
                 // Last key of previous row
                 if k == 0 {
                     if r == 0 {
                         let k = &rows[rows.len() - 1][rows[rows.len() - 1].len() - 1];
-                        *key_colours.key(*k).0 = 0;
+                        if let Some(c) = key_colours.key(*k) {
+                            *c.0 = 0;
+                        };
                     } else {
                         let k = &rows[r - 1][rows[r - 1].len() - 1];
-                        *key_colours.key(*k).0 = 0;
+                        if let Some(c) = key_colours.key(*k) {
+                            *c.0 = 0;
+                        };
                     }
                 } else {
                     let k = &rows[r][k - 1];
-                    *key_colours.key(*k).0 = 0;
+                    if let Some(c) = key_colours.key(*k) {
+                        *c.0 = 0;
+                    };
                 }
-                *key_colours.key(Key::Up).0 = 255;
-                *key_colours.key(Key::Left).0 = 255;
-                *key_colours.key(Key::Right).0 = 255;
-                *key_colours.key(Key::Down).0 = 255;
+                if let Some(c) = key_colours.key(Key::Up) {
+                    *c.0 = 255;
+                };
+                *key_colours.key(Key::Left).unwrap().0 = 255;
+                *key_colours.key(Key::Right).unwrap().0 = 255;
+                *key_colours.key(Key::Down).unwrap().0 = 255;
 
-                *key_colours.key(Key::W).0 = 255;
-                *key_colours.key(Key::A).0 = 255;
-                *key_colours.key(Key::S).0 = 255;
-                *key_colours.key(Key::D).0 = 255;
+                *key_colours.key(Key::W).unwrap().0 = 255;
+                *key_colours.key(Key::A).unwrap().0 = 255;
+                *key_colours.key(Key::S).unwrap().0 = 255;
+                *key_colours.key(Key::D).unwrap().0 = 255;
 
                 writer.write_colour_block(&key_colours)?;
                 std::thread::sleep(std::time::Duration::from_millis(100));
diff --git a/aura/examples/per-key-effect-2.rs b/aura/examples/per-key-effect-2.rs
index 5901a0bb..02ada36c 100644
--- a/aura/examples/per-key-effect-2.rs
+++ b/aura/examples/per-key-effect-2.rs
@@ -9,21 +9,21 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     loop {
         let count = 49;
         for _ in 0..count {
-            *key_colours.key(Key::ROG).0 += 5;
-            *key_colours.key(Key::L).0 += 5;
-            *key_colours.key(Key::I).0 += 5;
-            *key_colours.key(Key::N).0 += 5;
-            *key_colours.key(Key::U).0 += 5;
-            *key_colours.key(Key::X).0 += 5;
+            *key_colours.key(Key::ROG).unwrap().0 += 5;
+            *key_colours.key(Key::L).unwrap().0 += 5;
+            *key_colours.key(Key::I).unwrap().0 += 5;
+            *key_colours.key(Key::N).unwrap().0 += 5;
+            *key_colours.key(Key::U).unwrap().0 += 5;
+            *key_colours.key(Key::X).unwrap().0 += 5;
             writer.write_colour_block(&key_colours)?;
         }
         for _ in 0..count {
-            *key_colours.key(Key::ROG).0 -= 5;
-            *key_colours.key(Key::L).0 -= 5;
-            *key_colours.key(Key::I).0 -= 5;
-            *key_colours.key(Key::N).0 -= 5;
-            *key_colours.key(Key::U).0 -= 5;
-            *key_colours.key(Key::X).0 -= 5;
+            *key_colours.key(Key::ROG).unwrap().0 -= 5;
+            *key_colours.key(Key::L).unwrap().0 -= 5;
+            *key_colours.key(Key::I).unwrap().0 -= 5;
+            *key_colours.key(Key::N).unwrap().0 -= 5;
+            *key_colours.key(Key::U).unwrap().0 -= 5;
+            *key_colours.key(Key::X).unwrap().0 -= 5;
             writer.write_colour_block(&key_colours)?;
         }
     }
diff --git a/aura/examples/pulser.rs b/aura/examples/pulser.rs
index eb022406..b30aeea9 100644
--- a/aura/examples/pulser.rs
+++ b/aura/examples/pulser.rs
@@ -1,5 +1,4 @@
-use rog_aura::{AuraDbusWriter, GX502Layout, Key, KeyColourArray, KeyLayout};
-use std::ops::Sub;
+use rog_aura::{AuraDbusWriter, GX502Layout, KeyColourArray, KeyLayout};
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     let mut writer = AuraDbusWriter::new()?;
@@ -10,12 +9,14 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     writer.init_effect()?;
     let rows = layout.get_rows();
 
-    let mut fade = 50;
+    let mut fade = 17;
     let mut flip = false;
     loop {
         for row in rows {
             for (k, key) in row.iter().enumerate() {
-                *key_colours.key(*key).1 = 255 / fade / (k + 1) as u8;
+                if let Some(c) = key_colours.key(*key) {
+                    *c.0 = 255 / fade / (k + 1) as u8;
+                };
             }
         }
 
@@ -27,10 +28,11 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
             } else {
                 flip = !flip;
             }
-        } else if fade < 50 {
+        } else if fade < 17 {
             fade += 1;
         } else {
             flip = !flip;
         }
+        std::thread::sleep(std::time::Duration::from_millis(10));
     }
 }
diff --git a/aura/src/aura_dbus.rs b/aura/src/aura_dbus.rs
index b80d4b65..b771529b 100644
--- a/aura/src/aura_dbus.rs
+++ b/aura/src/aura_dbus.rs
@@ -3,14 +3,17 @@ use dbus::blocking::BlockingSender;
 use dbus::channel::Sender;
 use dbus::{blocking::Connection, Message};
 use std::error::Error;
-use std::sync::{Arc, Mutex};
+use std::sync::{
+    atomic::{AtomicBool, Ordering},
+    Arc,
+};
 use std::{thread, time::Duration};
 
 /// Simplified way to write a effect block
 pub struct AuraDbusWriter {
     connection: Box<Connection>,
     block_time: u64,
-    stop: Arc<Mutex<bool>>,
+    stop: Arc<AtomicBool>,
 }
 
 impl AuraDbusWriter {
@@ -20,7 +23,7 @@ impl AuraDbusWriter {
         Ok(AuraDbusWriter {
             connection: Box::new(connection),
             block_time: 10,
-            stop: Arc::new(Mutex::new(false)),
+            stop: Arc::new(AtomicBool::new(false)),
         })
     }
 
@@ -35,9 +38,7 @@ impl AuraDbusWriter {
                 println!("GOT {:?}", msg);
                 if let Ok(stop) = msg.read1::<bool>() {
                     if stop {
-                        if let Ok(mut lock) = stopper.lock() {
-                            *lock = true;
-                        }
+                        stopper.store(true, Ordering::Relaxed);
                     }
                 }
                 true
@@ -75,10 +76,8 @@ impl AuraDbusWriter {
             .append1(&group[10].to_vec());
         self.connection.send(msg).unwrap();
         thread::sleep(Duration::from_millis(self.block_time));
-        if let Ok(lock) = self.stop.try_lock() {
-            if *lock {
-                panic!("Go signal to stop!");
-            }
+        if self.stop.load(Ordering::Relaxed) {
+            panic!("Go signal to stop!");
         }
         Ok(())
     }
diff --git a/aura/src/builtins.rs b/aura/src/builtins.rs
index 6385a51a..2213a7d2 100644
--- a/aura/src/builtins.rs
+++ b/aura/src/builtins.rs
@@ -60,7 +60,7 @@ impl BuiltInModeBytes {
             BuiltInModeByte::WideZoomy => &self.widezoomy,
             _ => return None,
         };
-        return Some(bytes);
+        Some(bytes)
     }
 }
 impl Default for BuiltInModeBytes {
diff --git a/aura/src/fancy.rs b/aura/src/fancy.rs
index 2c48bd83..a838039a 100644
--- a/aura/src/fancy.rs
+++ b/aura/src/fancy.rs
@@ -5,6 +5,7 @@
 /// to the keyboard EC. One row controls one group of keys, these keys are not
 /// necessarily all on the same row of the keyboard, with some splitting between
 /// two rows.
+#[derive(Clone)]
 pub struct KeyColourArray([[u8; 64]; 11]);
 impl Default for KeyColourArray {
     fn default() -> Self {
@@ -43,15 +44,16 @@ impl KeyColourArray {
 
     #[inline]
     pub fn set(&mut self, key: Key, r: u8, g: u8, b: u8) {
-        let (rr, gg, bb) = self.key(key);
-        *rr = r;
-        *gg = g;
-        *bb = b;
+        if let Some((rr, gg, bb)) = self.key(key) {
+            *rr = r;
+            *gg = g;
+            *bb = b;
+        }
     }
 
     /// Indexes in to `KeyColourArray` at the correct row and column
     /// to set a series of three bytes to the chosen R,G,B values
-    pub fn key(&mut self, key: Key) -> (&mut u8, &mut u8, &mut u8) {
+    pub fn key(&mut self, key: Key) -> Option<(&mut u8, &mut u8, &mut u8)> {
         // Tuples are indexes in to array
         let (row, col) = match key {
             Key::VolDown => (0, 15),
@@ -161,14 +163,15 @@ impl KeyColourArray {
             //
             Key::Down => (10, 9),
             Key::Right => (10, 12),
+            Key::None => return None,
         };
         // LOLOLOLOLOLOLOL! Look it's safe okay
         unsafe {
-            (
+            Some((
                 &mut *(&mut self.0[row][col] as *mut u8),
                 &mut *(&mut self.0[row][col + 1] as *mut u8),
                 &mut *(&mut self.0[row][col + 2] as *mut u8),
-            )
+            ))
         }
     }
 
@@ -178,7 +181,7 @@ impl KeyColourArray {
     }
 }
 
-#[derive(Debug, Copy, Clone)]
+#[derive(Debug, PartialEq, Copy, Clone)]
 pub enum Key {
     VolUp,
     VolDown,
@@ -277,16 +280,17 @@ pub enum Key {
     Left,
     Right,
     RFn,
+    None,
 }
 
 pub trait KeyLayout {
-    fn get_rows(&self) -> &Vec<Vec<Key>>;
+    fn get_rows(&self) -> &Vec<[Key; 17]>;
 }
 
-pub struct GX502Layout(Vec<Vec<Key>>);
+pub struct GX502Layout(Vec<[Key; 17]>);
 
 impl KeyLayout for GX502Layout {
-    fn get_rows(&self) -> &Vec<Vec<Key>> {
+    fn get_rows(&self) -> &Vec<[Key; 17]> {
         &self.0
     }
 }
@@ -294,24 +298,45 @@ impl KeyLayout for GX502Layout {
 impl Default for GX502Layout {
     fn default() -> Self {
         GX502Layout(vec![
-            vec![Key::VolDown, Key::VolUp, Key::MicMute, Key::ROG],
-            vec![
+            [
+                Key::None,
+                Key::None,
+                Key::VolDown,
+                Key::VolUp,
+                Key::MicMute,
+                Key::ROG,
+                Key::None,
+                Key::None,
+                Key::None,
+                Key::None,
+                Key::None,
+                Key::None,
+                Key::None,
+                Key::None,
+                Key::None,
+                Key::None,
+                Key::None,
+            ],
+            [
                 Key::Esc,
+                Key::None,
                 Key::F1,
                 Key::F2,
                 Key::F3,
                 Key::F4,
+                Key::None, // not sure which key to put here
                 Key::F5,
                 Key::F6,
                 Key::F7,
                 Key::F8,
                 Key::F9,
+                Key::F9,
                 Key::F10,
                 Key::F11,
                 Key::F12,
                 Key::Del,
             ],
-            vec![
+            [
                 Key::Tilde,
                 Key::N1,
                 Key::N2,
@@ -330,7 +355,7 @@ impl Default for GX502Layout {
                 Key::BkSpc3,
                 Key::Home,
             ],
-            vec![
+            [
                 Key::Tab,
                 Key::Q,
                 Key::W,
@@ -345,9 +370,11 @@ impl Default for GX502Layout {
                 Key::LBracket,
                 Key::RBracket,
                 Key::BackSlash,
+                Key::BackSlash,
+                Key::BackSlash,
                 Key::PgUp,
             ],
-            vec![
+            [
                 Key::Caps,
                 Key::A,
                 Key::S,
@@ -360,13 +387,14 @@ impl Default for GX502Layout {
                 Key::L,
                 Key::SemiColon,
                 Key::Quote,
-                //
+                Key::Quote,
                 Key::Ret1,
                 Key::Ret2,
                 Key::Ret3,
                 Key::PgDn,
             ],
-            vec![
+            [
+                Key::LShift,
                 Key::LShift,
                 Key::Z,
                 Key::X,
@@ -378,28 +406,50 @@ impl Default for GX502Layout {
                 Key::Comma,
                 Key::Period,
                 Key::FwdSlash,
+                Key::FwdSlash,
                 Key::Rshift1,
                 Key::Rshift2,
                 Key::Rshift3,
                 Key::End,
             ],
-            vec![
+            [
                 Key::LCtrl,
                 Key::LFn,
-                //
                 Key::Meta,
                 Key::LAlt,
                 Key::Space1,
                 Key::Space2,
                 Key::Space3,
                 Key::Space4,
+                Key::Space4,
                 Key::RAlt,
                 Key::PrtSc,
                 Key::RCtrl,
+                Key::RCtrl,
+                Key::Left,
                 Key::Up,
+                Key::Right,
                 Key::RFn,
             ],
-            vec![Key::Left, Key::Down, Key::Right],
+            [
+                Key::None,
+                Key::None,
+                Key::None,
+                Key::None,
+                Key::None,
+                Key::None,
+                Key::None,
+                Key::None,
+                Key::None,
+                Key::None,
+                Key::None,
+                Key::None,
+                Key::None,
+                Key::Left,
+                Key::Down,
+                Key::Right,
+                Key::None,
+            ],
         ])
     }
 }
diff --git a/aura/src/lib.rs b/aura/src/lib.rs
index d1ba0d5b..49ba60da 100644
--- a/aura/src/lib.rs
+++ b/aura/src/lib.rs
@@ -1,6 +1,6 @@
-pub static DBUS_NAME: &'static str = "org.rogcore.Daemon";
-pub static DBUS_PATH: &'static str = "/org/rogcore/Daemon";
-pub static DBUS_IFACE: &'static str = "org.rogcore.Daemon";
+pub static DBUS_NAME: &str = "org.rogcore.Daemon";
+pub static DBUS_PATH: &str = "/org/rogcore/Daemon";
+pub static DBUS_IFACE: &str = "org.rogcore.Daemon";
 pub const LED_MSG_LEN: usize = 17;
 
 mod builtins;
diff --git a/rog-core/src/core.rs b/rog-core/src/core.rs
index 7b4d4b9d..44e04a4b 100644
--- a/rog-core/src/core.rs
+++ b/rog-core/src/core.rs
@@ -35,7 +35,7 @@ impl RogCore {
         let mut dev_handle = RogCore::get_device(vendor, product)?;
         dev_handle.set_active_configuration(0).unwrap_or(());
 
-        let dev_config = dev_handle.device().config_descriptor(0).unwrap();
+        let dev_config = dev_handle.device().config_descriptor(0)?;
         // Interface with outputs
         let mut interface = 0;
         for iface in dev_config.interfaces() {
@@ -54,7 +54,7 @@ impl RogCore {
             }
         }
 
-        dev_handle.set_auto_detach_kernel_driver(true).unwrap();
+        dev_handle.set_auto_detach_kernel_driver(true)?;
         dev_handle.claim_interface(interface)?;
 
         Ok(RogCore {
@@ -98,12 +98,9 @@ impl RogCore {
         let path = RogCore::get_fan_path()?;
         let mut file = OpenOptions::new().write(true).open(path)?;
         file.write_all(format!("{:?}\n", config.fan_mode).as_bytes())
-            .map_err(|err| {
-                error!("Could not write fan mode: {:?}", err);
-            })
-            .unwrap();
+            .unwrap_or_else(|err| error!("Could not write to {}, {:?}", path, err));
         self.set_pstate_for_fan_mode(FanLevel::from(config.fan_mode), config)?;
-        info!("Reloaded last saved settings");
+        info!("Reloaded fan mode: {:?}", FanLevel::from(config.fan_mode));
         Ok(())
     }
 
@@ -122,7 +119,9 @@ impl RogCore {
                 n = 0;
             }
             info!("Fan mode stepped to: {:#?}", FanLevel::from(n));
-            fan_ctrl.write_all(format!("{:?}\n", n).as_bytes())?;
+            fan_ctrl
+                .write_all(format!("{:?}\n", config.fan_mode).as_bytes())
+                .unwrap_or_else(|err| error!("Could not write to {}, {:?}", path, err));
             self.set_pstate_for_fan_mode(FanLevel::from(n), config)?;
             config.fan_mode = n;
             config.write();
diff --git a/rog-core/src/daemon.rs b/rog-core/src/daemon.rs
index a3f4d2f6..c66f6e72 100644
--- a/rog-core/src/daemon.rs
+++ b/rog-core/src/daemon.rs
@@ -157,18 +157,16 @@ pub async fn start_daemon() -> Result<(), Box<dyn Error>> {
                     }
                 }
                 // Write a colour block
-                if let Ok(mut effect_lock) = effect.try_lock() {
-                    // Spawn a writer
-                    if let Some(effect) = effect_lock.take() {
-                        if effect.len() == 11 {
-                            let mut config = config.lock().await;
-                            led_writer
-                                .do_command(AuraCommand::WriteEffect(effect), &mut config)
-                                .await
-                                .map_err(|err| warn!("{:?}", err))
-                                .unwrap();
-                            time_mark = Instant::now();
-                        }
+                let mut effect_lock = effect.lock().await;
+                if let Some(effect) = effect_lock.take() {
+                    if effect.len() == 11 {
+                        let mut config = config.lock().await;
+                        led_writer
+                            .do_command(AuraCommand::WriteEffect(effect), &mut config)
+                            .await
+                            .map_err(|err| warn!("{:?}", err))
+                            .unwrap();
+                        time_mark = Instant::now();
                     }
                 }
             }
diff --git a/rog-core/src/led_control.rs b/rog-core/src/led_control.rs
index 9e34191d..79930628 100644
--- a/rog-core/src/led_control.rs
+++ b/rog-core/src/led_control.rs
@@ -52,6 +52,7 @@ impl<'d, C> LedWriter<'d, C>
 where
     C: rusb::UsbContext,
 {
+    #[inline]
     pub fn new(
         device_handle: NonNull<DeviceHandle<C>>,
         led_endpoint: u8,
@@ -140,11 +141,12 @@ where
     }
 
     /// Should only be used if the bytes you are writing are verified correct
+    #[inline]
     async fn write_bytes(&self, message: &[u8]) -> Result<(), AuraError> {
         match unsafe { self.handle.as_ref() }.write_interrupt(
             self.led_endpoint,
             message,
-            Duration::from_millis(10),
+            Duration::from_millis(2),
         ) {
             Ok(_) => {}
             Err(err) => match err {
@@ -155,6 +157,7 @@ where
         Ok(())
     }
 
+    #[inline]
     async fn write_array_of_bytes(&self, messages: &[&[u8]]) -> Result<(), AuraError> {
         for message in messages {
             self.write_bytes(*message).await?;
@@ -168,6 +171,7 @@ where
     /// Write an effect block
     ///
     /// `aura_effect_init` must be called any effect routine, and called only once.
+    #[inline]
     async fn write_effect(&mut self, effect: Vec<Vec<u8>>) -> Result<(), AuraError> {
         if self.flip_effect_write {
             for row in effect.iter().rev() {
@@ -179,10 +183,12 @@ where
             }
         }
         self.flip_effect_write = !self.flip_effect_write;
+        let now = std::time::Instant::now();
         Ok(())
     }
 
     /// Used to set a builtin mode and save the settings for it
+    #[inline]
     async fn set_and_save(&self, bytes: &[u8], config: &mut Config) -> Result<(), AuraError> {
         let mode = BuiltInModeByte::from(bytes[3]);
         // safety pass-through of possible effect write
@@ -201,6 +207,7 @@ where
     }
 
     /// Used to set a builtin mode and save the settings for it
+    #[inline]
     async fn reload_last_builtin(&self, config: &Config) -> Result<(), AuraError> {
         let mode_curr = config.current_mode[3];
         let mode = config
@@ -220,6 +227,7 @@ where
     /// Select next Aura effect
     ///
     /// If the current effect is the last one then the effect selected wraps around to the first.
+    #[inline]
     async fn set_builtin(&self, config: &mut Config, index: usize) -> Result<(), AuraError> {
         let mode_next = config
             .builtin_modes
diff --git a/rog-core/src/lib.rs b/rog-core/src/lib.rs
index 1a84daae..d308fc7b 100644
--- a/rog-core/src/lib.rs
+++ b/rog-core/src/lib.rs
@@ -1,3 +1,4 @@
+#![deny(unused_must_use)]
 /// Configuration loading, saving
 mod config;
 /// The core module which allows writing to LEDs or polling the