diff --git a/sslo_league/src/app_state/slot_mgr/ctrl_interface.rs b/sslo_league/src/app_state/slot_mgr/ctrl_interface.rs
deleted file mode 100644
index e69de29..0000000
diff --git a/sslo_league/src/app_state/slot_mgr/slot_ctrl.rs b/sslo_league/src/app_state/slot_mgr/slot_ctrl.rs
index cc683c1..48ab2c8 100644
--- a/sslo_league/src/app_state/slot_mgr/slot_ctrl.rs
+++ b/sslo_league/src/app_state/slot_mgr/slot_ctrl.rs
@@ -1,29 +1,71 @@
+use std::sync::{Arc, Mutex};
 use std::thread::JoinHandle;
 use sslo_lib::error::SsloError;
 use sslo_lib::ndpc2::collection::NdpcCollection;
+use sslo_lib::sync;
+use sslo_lib::sync::command::{Commander, Executor};
+use sslo_lib::sync::state::{Reporter, Reviewer};
 use crate::app_state::AppState;
+use crate::app_state::db2::DatabaseManager;
 use crate::ndpc::coll_preset::CollPreset;
 use crate::app_state::shutdown_control::ShutdownControl;
 
+/// possible commands for the slot controller
+#[derive(Clone)]
+pub enum SlotCtrlCmd {
+
+    /// request to start a new server
+    StartServer(CollPreset),
+
+    /// request to gracefully end a running server
+    CloseServer,
+
+    /// forcefully kill a running server
+    KillServer,
+}
+
+#[derive(Clone)]
+pub enum SlotCtrlCmdRsp {
+
+    /// Command has been received and will be executed
+    Ok,
+
+    /// command cannot be executed for the specified reason
+    Rejected(String),
+}
+
+#[derive(Clone)]
+pub enum SlotCtrlStat {
+    Initialization,
+    Execution,
+}
+
+
+#[derive(Clone)]
 pub struct SlotCtrl {
-    thread_handle: JoinHandle<()>,
+    thread_handle: Arc<Mutex<JoinHandle<()>>>,
+    commander: Commander<SlotCtrlCmd, SlotCtrlCmdRsp>,
+    reviewer: Reviewer<SlotCtrlStat>
 }
 impl SlotCtrl {
     pub fn new(slot_id: usize,
                sc: ShutdownControl,
-               app_state: AppState,
-               cmd_rx: SlotCtrlCmdRx,
-               stat_tx: SlotCtrlStatTx,) -> Result<Self, SsloError> {
-        let thread_handle = match std::thread::Builder::new()
+               db: DatabaseManager
+    ) -> Result<Self, SsloError> {
+
+        // create interface
+        let (commander, executor) = sync::command::create_channel();
+        let (reporter, reviewer) = sync::state::create_channel();
+
+        let thread_handle = Arc::new(Mutex::new(match std::thread::Builder::new()
             .name(format!("Slot Controller {}", slot_id))
             .spawn(move || {
                 worker(SlotControllerState {
                     slot_id,
                     sc,
-                    app_state,
-                    cmd_rx,
-                    stat_tx,
-                    session: SlotCtrlSessionStat::Idle,
+                    db,
+                    executor,
+                    reporter,
                 });
             }) {
             Ok(handle) => handle,
@@ -31,10 +73,12 @@ impl SlotCtrl {
                 log::error!("Failed to start Slot Controller SlotID{}: {}", slot_id, e);
                 return Err(SsloError::ThreadSpawnError(e))
             }
-        };
+        }));
 
         Ok(Self{
             thread_handle,
+            commander,
+            reviewer,
         })
     }
 
@@ -47,10 +91,9 @@ impl SlotCtrl {
 struct SlotControllerState {
     slot_id: usize,
     sc: ShutdownControl,
-    app_state: AppState,
-    session: SlotCtrlSessionStat,
-    cmd_rx: SlotCtrlCmdRx,
-    stat_tx: SlotCtrlStatTx,
+    db: DatabaseManager,
+    executor: Executor<SlotCtrlCmd, SlotCtrlCmdRsp>,
+    reporter: Reporter<SlotCtrlStat>,
 }
 
 fn worker(state: SlotControllerState) {
diff --git a/sslo_league/src/http/routes_html/slots.rs b/sslo_league/src/http/routes_html/slots.rs
index 59f05c4..8612bec 100644
--- a/sslo_league/src/http/routes_html/slots.rs
+++ b/sslo_league/src/http/routes_html/slots.rs
@@ -41,7 +41,7 @@ pub async fn handler_slot(State(app_state): State<AppState>,
 
     // get slot status
     let slot_states = app_state.substate().slot_states();
-    let slot_status: SlotCtrlStat = match slot_states.into_iter().find(|ss| ss.slot_id == slot_id) {
+    let slot_status = match slot_states.into_iter().find(|ss| ss.slot_id == slot_id) {
         None => return Err(StatusCode::NOT_FOUND),
         Some(ss) => ss,
     };
@@ -57,13 +57,13 @@ pub async fn handler_slot(State(app_state): State<AppState>,
     }
 
     // show current active preset
-    match &slot_status.session {
-        SlotCtrlSessionStat::Unknown => {},
-        SlotCtrlSessionStat::Idle => {},
-        SlotCtrlSessionStat::StartingSession(preset) => { html.push_body(&preset.html_view(&db).await) },
-        SlotCtrlSessionStat::RunningSession(preset) => {html.push_body(&preset.html_view(&db).await) },
-        SlotCtrlSessionStat::EndingSession(preset) => {html.push_body(&preset.html_view(&db).await) },
-    }
+    // match &slot_status.session {
+    //     SlotCtrlSessionStat::Unknown => {},
+    //     SlotCtrlSessionStat::Idle => {},
+    //     SlotCtrlSessionStat::StartingSession(preset) => { html.push_body(&preset.html_view(&db).await) },
+    //     SlotCtrlSessionStat::RunningSession(preset) => {html.push_body(&preset.html_view(&db).await) },
+    //     SlotCtrlSessionStat::EndingSession(preset) => {html.push_body(&preset.html_view(&db).await) },
+    // }
 
     html.push_body(&slot_status.html_item().format());
     Ok(html.into_response().await)