diff --git a/deps.edn b/deps.edn
index 77d11a04..2fffb37c 100644
--- a/deps.edn
+++ b/deps.edn
@@ -3,7 +3,7 @@
          com.cognitect/transit-cljs {:mvn/version "0.8.280"}
          com.hyperfiddle/hyperfiddle-contrib {:mvn/version "v0-alpha-SNAPSHOT"}
          com.hyperfiddle/rcf        {:mvn/version "20220926-202227"}
-         missionary/missionary      {:mvn/version "b.43"}
+         missionary/missionary      {:mvn/version "b.44"}
          fipp/fipp                  {:mvn/version "0.6.26"}
          org.clojure/clojure        {:mvn/version "1.12.0-alpha11"}
          org.clojure/clojurescript  {:mvn/version "1.11.121"}
diff --git a/src/hyperfiddle/electric/impl/runtime3.cljc b/src/hyperfiddle/electric/impl/runtime3.cljc
index 2747c1cc..c37e248c 100644
--- a/src/hyperfiddle/electric/impl/runtime3.cljc
+++ b/src/hyperfiddle/electric/impl/runtime3.cljc
@@ -1540,26 +1540,24 @@ T T T -> (EXPR T)
     (when-some [^objects channel (aget remote remote-slot-channel)]
       (channel-output-event channel))))
 
-;; is expr always a slot ? if true, we can specialize to ports
-(deftype Incseq [peer expr]
-  IFn
-  (#?(:clj invoke :cljs -invoke) [_ step done]
-    (let [busy (enter peer)]
-      (deps expr run input-attach (peer-site peer))
-      ;; TODO request
-      (exit peer busy)
-      ((->flow expr) step
-       #(let [busy (enter peer)]
-          (deps expr run input-detach (peer-site peer))
-          ;; TODO request
-          (exit peer busy)
-          (done))))))
-
-(defn incseq-expr [^Incseq incseq]
-  (.-expr incseq))
+(defn attach-deps [peer expr]
+  (let [busy (enter peer)]
+    (deps expr run input-attach (peer-site peer))
+    (exit peer busy)))
+
+(defn detach-deps [peer expr]
+  (let [busy (enter peer)]
+    (deps expr run input-detach (peer-site peer))
+    (exit peer busy)))
 
 (defn incseq [^Frame frame expr]
-  (->Incseq (frame-peer frame) expr))
+  (let [peer (frame-peer frame)]
+    (m/sample {}
+      (m/observe
+        (fn [!] (! nil)
+          (attach-deps peer expr)
+          #(detach-deps peer expr)))
+      (->flow expr))))
 
 (defn frame-result-slot [^Frame frame]
   (let [^objects nodes (.-nodes frame)]
diff --git a/test/hyperfiddle/electric3_test.cljc b/test/hyperfiddle/electric3_test.cljc
index c170c0b0..b1dafc4e 100644
--- a/test/hyperfiddle/electric3_test.cljc
+++ b/test/hyperfiddle/electric3_test.cljc
@@ -2386,11 +2386,11 @@
       % := '[join 0 cancelling]
       % := '[join 0 cancelled]
       % := '[join 0 transferring]
-      % := '[join 0 terminating]
-      % := '[join 0 terminated]
       % := '[join 0 transferred Cancelled]
       % := '[join 0 cancelling]
       % := '[join 0 cancelled]
+      % := '[join 0 terminating]
+      % := '[join 0 terminated]
       (tap ::done), % := ::done)))
 
 (tests
@@ -2414,11 +2414,11 @@
       % := '[join 0 cancelling]
       % := '[join 0 cancelled]
       % := '[join 0 transferring]
-      % := '[join 0 terminating]
-      % := '[join 0 terminated]
       % := '[join 0 transferred Cancelled]
       % := '[join 0 cancelling]
       % := '[join 0 cancelled]
+      % := '[join 0 terminating]
+      % := '[join 0 terminated]
       (tap ::done), % := ::done)))
 
 ;; if we don't type hint the call to `fooBar` in the compiler the tests blow up on the inference warning.