diff --git a/crates/device/Cargo.toml b/crates/device/Cargo.toml
index 669f1efc..ef59f3ba 100644
--- a/crates/device/Cargo.toml
+++ b/crates/device/Cargo.toml
@@ -13,7 +13,12 @@ wavers     = { workspace = true, optional = true }
 
 [features]
 default   = [ "clock", "sequencer", "sampler" ]
-lv2       = [ "livi" ]
+clock     = []
 sampler   = [ "symphonia", "wavers" ]
 sequencer = [ "clock", "uuid" ]
-clock     = []
+plugin    = [] # temporary
+lv2       = [ "livi" ]
+vst2      = []
+vst3      = []
+clap      = []
+sf2       = []
diff --git a/crates/device/src/lib.rs b/crates/device/src/lib.rs
index 2531f35a..6c786213 100644
--- a/crates/device/src/lib.rs
+++ b/crates/device/src/lib.rs
@@ -29,10 +29,12 @@ pub(crate) use ratatui::{prelude::Rect, widgets::{Widget, canvas::{Canvas, Line}
 
 #[derive(Debug)]
 pub enum Device {
-    #[cfg(feature = "sequencer")]
-    Sequencer(MidiPlayer),
-    #[cfg(feature = "sampler")]
-    Sampler(Sampler),
-    #[cfg(feature = "plugin")]
-    Plugin(Plugin),
+    #[cfg(feature = "sequencer")] Sequencer(MidiPlayer),
+    #[cfg(feature = "sampler")]   Sampler(Sampler),
+    #[cfg(feature = "plugin")]    Plugin(Plugin),
+    #[cfg(feature = "lv2")]       Lv2,  // TODO
+    #[cfg(feature = "vst2")]      Vst2, // TODO
+    #[cfg(feature = "vst3")]      Vst3, // TODO
+    #[cfg(feature = "clap")]      Clap, // TODO
+    #[cfg(feature = "sf2")]       Sf2,  // TODO
 }
diff --git a/crates/engine/src/jack.rs b/crates/engine/src/jack.rs
index bcc64a04..b13d667e 100644
--- a/crates/engine/src/jack.rs
+++ b/crates/engine/src/jack.rs
@@ -15,4 +15,3 @@ pub(crate) use std::sync::{Arc, RwLock};
 mod jack_client; pub use self::jack_client::*;
 mod jack_event; pub use self::jack_event::*;
 mod jack_port; pub use self::jack_port::*;
-
diff --git a/crates/engine/src/lib.rs b/crates/engine/src/lib.rs
index da26acb2..b4840a09 100644
--- a/crates/engine/src/lib.rs
+++ b/crates/engine/src/lib.rs
@@ -1,7 +1,7 @@
 #![feature(type_alias_impl_trait)]
 
-mod time;  pub use self::time::*;
-mod note;  pub use self::note::*;
+mod time; pub use self::time::*;
+mod note; pub use self::note::*;
 pub mod jack; pub use self::jack::*;
 pub mod midi; pub use self::midi::*;
 
@@ -10,11 +10,7 @@ pub(crate) use std::path::PathBuf;
 pub(crate) use std::fmt::Debug;
 pub(crate) use std::ops::{Add, Sub, Mul, Div, Rem};
 
-pub(crate) use ::tengri::input::*;
-pub(crate) use ::tengri::output::*;
-pub(crate) use ::tengri::dsl::*;
 pub(crate) use ::tengri::tui::*;
-pub(crate) use ::tengri::tui::ratatui::style::{Style, Stylize, Color};
 
 pub use ::atomic_float; pub(crate) use atomic_float::*;