diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index c4a6b4e..5e03eb2 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -11,7 +11,7 @@ jobs:
       - uses: flucoma/actions/env@main
       - uses: flucoma/actions/sc@main
         with: 
-          branch: origin/production
+          branch: origin/${{ github.ref_name }}
 
       - name: sign binaries
         uses: flucoma/actions/distribution@main
@@ -38,7 +38,7 @@ jobs:
       - uses: flucoma/actions/env@main
       - uses: flucoma/actions/sc@main
         with: 
-          branch: origin/production
+          branch: origin/${{ github.ref_name }}
 
       - name: remove pdb files
         run: Remove-Item install -Recurse -Include *.pdb
@@ -61,7 +61,7 @@ jobs:
       - uses: flucoma/actions/env@main
       - uses: flucoma/actions/sc@main
         with: 
-          branch: origin/production
+          branch: origin/${{ github.ref_name }}
 
       - name: compress archive
         run: tar -zcvf FluCoMa-SC-Linux.tar.gz FluidCorpusManipulation
@@ -73,7 +73,7 @@ jobs:
           path: install/FluCoMa-SC-Linux.tar.gz
           
       - id: get-version
-        run: echo "::set-output name=version::$(cat flucoma.version.rc)"
+        run: echo "version=$(cat flucoma.version.rc)" >> $GITHUB_OUTPUT
         working-directory: build/_deps/flucoma-core-src
   
   release:
@@ -93,6 +93,14 @@ jobs:
         with:
           name: linuxbuild
 
+      - name: delete pre-existing release
+        uses: dev-drprasad/delete-tag-and-release@v0.2.1
+        with:
+          delete_release: true # default: false
+          tag_name: ${{ needs.linuxbuild.outputs.version }} # tag name to delete
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
       - name: package and upload
         uses: softprops/action-gh-release@v1
         with:
@@ -101,5 +109,6 @@ jobs:
           files: FluCoMa*
           prerelease: true
           tag_name: ${{ needs.linuxbuild.outputs.version }}
+          target_commitish: ${{ github.sha }}
           draft: false
 
diff --git a/release-packaging/Classes/FluidKDTree.sc b/release-packaging/Classes/FluidKDTree.sc
index f850d7f..53b4fb6 100644
--- a/release-packaging/Classes/FluidKDTree.sc
+++ b/release-packaging/Classes/FluidKDTree.sc
@@ -48,13 +48,9 @@ FluidKDTree : FluidModelObject
 		this.prSendMsg(this.kNearestDistMsg(buffer,k));
 	}
 
-	kr{|trig, inputBuffer,outputBuffer, numNeighbours = 1, lookupDataSet|
-		/*        this.numNeighbours_(numNeighbours);
-		lookupDataSet = lookupDataSet ? -1;
-		this.lookupDataSet_(lookupDataSet);*/
-
+	kr{|trig, inputBuffer, outputBuffer, numNeighbours, radius, lookupDataSet|
 		^FluidKDTreeQuery.kr(trig,
-			this, numNeighbours, this.radius,lookupDataSet.asUGenInput,
+			this, numNeighbours??{this.numNeighbours}, radius??{this.radius}, lookupDataSet.asUGenInput,
 			inputBuffer,outputBuffer);
 	}
 
@@ -62,8 +58,8 @@ FluidKDTree : FluidModelObject
 
 FluidKDTreeQuery : FluidRTMultiOutUGen
 {
-	*kr{ |trig, tree, numNeighbours, radius,lookupDataSet, inputBuffer, outputBuffer |
-		^this.multiNew('control',trig, tree.asUGenInput, numNeighbours, radius,lookupDataSet!?(_.asUGenInput)??{-1}, inputBuffer.asUGenInput, outputBuffer.asUGenInput)
+	*kr{ |trig, tree, numNeighbours, radius, lookupDataSet, inputBuffer, outputBuffer |
+		^this.multiNew('control', trig, tree.asUGenInput, numNeighbours, radius, lookupDataSet!?(_.asUGenInput)??{-1}, inputBuffer.asUGenInput, outputBuffer.asUGenInput)
 	}
 
 	init { arg ... theInputs;
diff --git a/release-packaging/Classes/FluidKNNRegressor.sc b/release-packaging/Classes/FluidKNNRegressor.sc
index 992b67e..5f009e5 100644
--- a/release-packaging/Classes/FluidKNNRegressor.sc
+++ b/release-packaging/Classes/FluidKNNRegressor.sc
@@ -23,23 +23,27 @@ FluidKNNRegressor : FluidModelObject {
 		^this.prMakeMsg(\predict,this.id,sourceDataSet.id,targetDataSet.id)
 	}
 
-	predict{ |sourceDataSet, targetDataSet,action|
+	predict{ |sourceDataSet, targetDataSet, action|
 		actions[\predict] = [nil, action];
 		this.prSendMsg(this.predictMsg(sourceDataSet, targetDataSet));
 	}
 
-	predictPointMsg { |buffer|
-		^this.prMakeMsg(\predictPoint,id, this.prEncodeBuffer(buffer));
+	predictPointMsg { |sourceBuffer, targetBuffer|
+		^this.prMakeMsg(\predictPoint,id,
+			this.prEncodeBuffer(sourceBuffer),
+			this.prEncodeBuffer(targetBuffer),
+			["/b_query", targetBuffer.asUGenInput]);
 	}
 
-	predictPoint { |buffer, action|
-		actions[\predictPoint] = [number(FluidMessageResponse,_,_),action];
-		this.prSendMsg(this.predictPointMsg(buffer));
+	predictPoint { |sourceBuffer, targetBuffer, action|
+		actions[\predictPoint] = [nil,{action.value(targetBuffer)}];
+		this.predictPointMsg(sourceBuffer, targetBuffer);
+		this.prSendMsg(this.predictPointMsg(sourceBuffer, targetBuffer));
 	}
 
-	kr{|trig, inputBuffer,outputBuffer|
+	kr{|trig, inputBuffer, outputBuffer, numNeighbours, weight|
 		^FluidKNNRegressorQuery.kr(K2A.ar(trig),
-			this, this.numNeighbours, this.weight,
+			this, numNeighbours??{this.numNeighbours}, weight??{this.weight},
 			this.prEncodeBuffer(inputBuffer),
 			this.prEncodeBuffer(outputBuffer));
 	}