diff --git a/src/device/clock.rs b/src/device/clock.rs
index 6aedab97..11a85607 100644
--- a/src/device/clock.rs
+++ b/src/device/clock.rs
@@ -65,18 +65,6 @@ pub trait HasClock: AsRef<Clock> + AsMut<Clock> {
 /// can be clocked in microseconds with f64 without losing precision.
 pub trait TimeUnit: InteriorMutable<f64> {}
 
-/// Contains memoized renders of clock values.
-///
-/// Performance optimization.
-#[derive(Debug)] pub struct ClockView {
-    pub sr:   Memo<Option<(bool, f64)>, String>,
-    pub buf:  Memo<Option<f64>, String>,
-    pub lat:  Memo<Option<f64>, String>,
-    pub bpm:  Memo<Option<f64>, String>,
-    pub beat: Memo<Option<f64>, String>,
-    pub time: Memo<Option<f64>, String>,
-}
-
 pub const DEFAULT_PPQ: f64 = 96.0;
 
 /// FIXME: remove this and use PPQ from timebase everywhere:
@@ -377,71 +365,6 @@ impl<T: HasClock> Act<T> for ClockCommand {
     }
 }
 
-impl ClockView {
-    pub const BEAT_EMPTY: &'static str = "-.-.--";
-    pub const TIME_EMPTY: &'static str = "-.---s";
-    pub const BPM_EMPTY:  &'static str = "---.---";
-    pub fn update_clock (cache: &Arc<RwLock<Self>>, clock: &Clock, compact: bool) {
-        let rate  = clock.timebase.sr.get();
-        let chunk = clock.chunk.load(Relaxed) as f64;
-        let lat   = chunk / rate * 1000.;
-        let delta = |start: &Moment|clock.global.usec.get() - start.usec.get();
-        let mut cache = cache.write().unwrap();
-
-        cache.buf.update(
-            Some(chunk), rewrite!(buf, "{chunk}")
-        );
-
-        cache.lat.update(
-            Some(lat), rewrite!(buf, "{lat:.1}ms")
-        );
-
-        cache.sr.update(
-            Some((compact, rate)), |buf: &mut String,_,_|{
-                buf.clear();
-                if compact {
-                    write!(buf, "{:.1}kHz", rate / 1000.)
-                } else {
-                    write!(buf, "{:.0}Hz", rate)
-                }
-            }
-        );
-
-        if let Some(now) = clock.started.read().unwrap().as_ref().map(delta) {
-            let pulse = clock.timebase.usecs_to_pulse(now);
-            let time  = now/1000000.;
-            let bpm   = clock.timebase.bpm.get();
-            cache.beat.update(Some(pulse), |buf, _, _|{
-                buf.clear();
-                clock.timebase.format_beats_1_to(buf, pulse)
-            });
-            cache.time.update(Some(time), rewrite!(buf, "{:.3}s", time));
-            cache.bpm.update(Some(bpm),   rewrite!(buf, "{:.3}",  bpm));
-        } else {
-            cache.beat.update(None, rewrite!(buf, "{}", ClockView::BEAT_EMPTY));
-            cache.time.update(None, rewrite!(buf, "{}", ClockView::TIME_EMPTY));
-            cache.bpm.update(None,  rewrite!(buf, "{}", ClockView::BPM_EMPTY));
-        }
-    }
-}
-
-impl_default!(ClockView: {
-    let mut beat = String::with_capacity(16);
-    let _ = write!(beat, "{}", Self::BEAT_EMPTY);
-    let mut time = String::with_capacity(16);
-    let _ = write!(time, "{}", Self::TIME_EMPTY);
-    let mut bpm  = String::with_capacity(16);
-    let _ = write!(bpm,  "{}", Self::BPM_EMPTY);
-    Self {
-        beat: Memo::new(None, beat),
-        time: Memo::new(None, time),
-        bpm:  Memo::new(None, bpm),
-        sr:   Memo::new(None, String::with_capacity(16)),
-        buf:  Memo::new(None, String::with_capacity(16)),
-        lat:  Memo::new(None, String::with_capacity(16)),
-    }
-});
-
 #[cfg(feature = "clock")] impl_has!(Clock: |self: Track|self.sequencer.clock);
 impl_default!(Timebase: Self::new(48000f64, 150f64, DEFAULT_PPQ));
 impl_time_unit!(SampleCount);
@@ -456,3 +379,4 @@ impl_time_unit!(LaunchSync);
 mod moment; pub use self::moment::*;
 mod ticker; pub use self::ticker::*;
 mod timebase; pub use self::timebase::*;
+mod clock_view; pub use self::clock_view::*;
diff --git a/src/device/clock/clock_view.rs b/src/device/clock/clock_view.rs
new file mode 100644
index 00000000..009982b1
--- /dev/null
+++ b/src/device/clock/clock_view.rs
@@ -0,0 +1,78 @@
+use crate::*;
+
+/// Contains memoized renders of clock values.
+///
+/// Performance optimization.
+#[derive(Debug)] pub struct ClockView {
+    pub sr:   Memo<Option<(bool, f64)>, String>,
+    pub buf:  Memo<Option<f64>, String>,
+    pub lat:  Memo<Option<f64>, String>,
+    pub bpm:  Memo<Option<f64>, String>,
+    pub beat: Memo<Option<f64>, String>,
+    pub time: Memo<Option<f64>, String>,
+}
+
+impl_default!(ClockView: {
+    let mut beat = String::with_capacity(16);
+    let _ = write!(beat, "{}", Self::BEAT_EMPTY);
+    let mut time = String::with_capacity(16);
+    let _ = write!(time, "{}", Self::TIME_EMPTY);
+    let mut bpm  = String::with_capacity(16);
+    let _ = write!(bpm,  "{}", Self::BPM_EMPTY);
+    Self {
+        beat: Memo::new(None, beat),
+        time: Memo::new(None, time),
+        bpm:  Memo::new(None, bpm),
+        sr:   Memo::new(None, String::with_capacity(16)),
+        buf:  Memo::new(None, String::with_capacity(16)),
+        lat:  Memo::new(None, String::with_capacity(16)),
+    }
+});
+
+impl ClockView {
+    pub const BEAT_EMPTY: &'static str = "-.-.--";
+    pub const TIME_EMPTY: &'static str = "-.---s";
+    pub const BPM_EMPTY:  &'static str = "---.---";
+    pub fn update_clock (cache: &Arc<RwLock<Self>>, clock: &Clock, compact: bool) {
+        let rate  = clock.timebase.sr.get();
+        let chunk = clock.chunk.load(Relaxed) as f64;
+        let lat   = chunk / rate * 1000.;
+        let delta = |start: &Moment|clock.global.usec.get() - start.usec.get();
+        let mut cache = cache.write().unwrap();
+
+        cache.buf.update(
+            Some(chunk), rewrite!(buf, "{chunk}")
+        );
+
+        cache.lat.update(
+            Some(lat), rewrite!(buf, "{lat:.1}ms")
+        );
+
+        cache.sr.update(
+            Some((compact, rate)), |buf: &mut String,_,_|{
+                buf.clear();
+                if compact {
+                    write!(buf, "{:.1}kHz", rate / 1000.)
+                } else {
+                    write!(buf, "{:.0}Hz", rate)
+                }
+            }
+        );
+
+        if let Some(now) = clock.started.read().unwrap().as_ref().map(delta) {
+            let pulse = clock.timebase.usecs_to_pulse(now);
+            let time  = now/1000000.;
+            let bpm   = clock.timebase.bpm.get();
+            cache.beat.update(Some(pulse), |buf, _, _|{
+                buf.clear();
+                clock.timebase.format_beats_1_to(buf, pulse)
+            });
+            cache.time.update(Some(time), rewrite!(buf, "{:.3}s", time));
+            cache.bpm.update(Some(bpm),   rewrite!(buf, "{:.3}",  bpm));
+        } else {
+            cache.beat.update(None, rewrite!(buf, "{}", ClockView::BEAT_EMPTY));
+            cache.time.update(None, rewrite!(buf, "{}", ClockView::TIME_EMPTY));
+            cache.bpm.update(None,  rewrite!(buf, "{}", ClockView::BPM_EMPTY));
+        }
+    }
+}
diff --git a/src/device/editor.rs b/src/device/editor.rs
index 943c8514..822ac099 100644
--- a/src/device/editor.rs
+++ b/src/device/editor.rs
@@ -24,7 +24,10 @@ pub struct MidiEditor {
 
 impl_default!(MidiEditor: Self {
     mode: PianoHorizontal::new(None),
-    size: Size(0.into(), 0.into()),
+    size: Size(
+        Arc::new(0usize.into()),
+        Arc::new(0usize.into()),
+    ),
 });
 
 impl MidiEditor {
diff --git a/src/device/sampler.rs b/src/device/sampler.rs
index 61abcf40..da02443b 100644
--- a/src/device/sampler.rs
+++ b/src/device/sampler.rs
@@ -81,7 +81,7 @@ impl NoteRange for Sampler {
         &self.note_lo
     }
     fn note_axis (&self) -> &AtomicUsize {
-        &self.size.y
+        &self.size.1
     }
 }
 
diff --git a/tengri b/tengri
index 0273d2ac..cb382cf1 160000
--- a/tengri
+++ b/tengri
@@ -1 +1 @@
-Subproject commit 0273d2ac75b8a144ea03b4bdd94d08003f3589df
+Subproject commit cb382cf12e9169310ddab4eca2ca01e87fde9869