diff --git a/.github/workflows/render_previews.yml b/.github/workflows/render_previews.yml
index b5ea8bee..998076f6 100644
--- a/.github/workflows/render_previews.yml
+++ b/.github/workflows/render_previews.yml
@@ -48,16 +48,21 @@ jobs:
         rm CAD/stl/*.stl ||:
         rm CAD/amf/*.amf ||:
 
-    - name: Make
+    - name: Make -d CAD/src
       run: |
         cd CAD/src
         make
 
-    - name: Make
+    - name: Make -d CAD/src/assembly (position)
       run: |
         cd CAD/src/assembly
         make
-        
+
+    - name: Make -d CAD/src/assembly (test blender)
+      run: |
+        cd CAD/src/assembly/test
+        make
+
     - name: Upload a PNG Artifact
       uses: actions/upload-artifact@v2.2.2
       with:
diff --git a/CAD/src/assembly/test/Makefile b/CAD/src/assembly/test/Makefile
new file mode 100644
index 00000000..4f7ff324
--- /dev/null
+++ b/CAD/src/assembly/test/Makefile
@@ -0,0 +1,13 @@
+STL_DIR=../../../stl
+AMF_DIR=../../../amf
+IMG_DIR=png
+SRC_DIR=../../../src/assembly/test
+# DEP_DIR=../../../dep
+# GCD_DIR=../../../gcode
+# INI_DIR=../../../slicing
+GIT_ROOT=../../../../
+OUTPUT_FOLDER=.
+NAME_PREFIX=TF-G2_assembly
+PROCESSOR3D_PARAM=--no_gcode --no_amf
+
+include ../../../../utils/Makefile
diff --git a/CAD/src/assembly/test/assembly_888_test.scad b/CAD/src/assembly/test/assembly_888_test.scad
new file mode 100644
index 00000000..ce10ff23
--- /dev/null
+++ b/CAD/src/assembly/test/assembly_888_test.scad
@@ -0,0 +1,71 @@
+//@set_type(solid)
+include <../../../parameters.scad>
+//@blender_template(../../build_manual/blender/build_manual_template.blend)
+//@blender_updater= ../../build_manual/update_render_src.py
+$fn=10;
+// TODO: render viewport to position of camera
+//       e.g. see ../../build_manual/src/buildmanual_0001_c.json
+//# @blender_config(../../build_manual/src/buildmanual_0001_c.json)
+//$vpt=[-400,-500,300];
+//$vpr=[70,0,-45];
+
+// include <yasim.scad>
+
+////import_stl("stl/buildmanual_motor.stl", convexity = 5);
+//import("../build_manual/stl/buildmanual_motor.stl");
+
+//include <../position/position_888_1001.scad> // podlozka
+//include <position/position_888_1002.scad> // Motorova pricka
+//include <position/position_888_1003.scad> // Bocnice
+include <../position/position_888_1006.scad> // Policka na payload
+//include <position/position_888_1007.scad> // spodni pricka pylonu
+//include <position/position_888_1008.scad> // horni pricka pylonu
+//include <position/position_888_1009.scad> // 
+//include <position/position_888_1010.scad> // TFSLOT
+//include <position/position_888_1011.scad>
+//include <position/position_888_1012.scad>
+//include <position/position_888_1009.scad>
+//include <position/position_888_1013.scad>
+//include <position/position_888_1018.scad>
+//include <position/position_rotor.scad>
+//include <../888_1016.scad>
+// include <position/position_888_2002.scad> // podvozek
+//include <position/position_888_3000.scad>
+//include <position/position_888_3006.scad>
+//include <position/position_screw_01.scad>
+//include <position/position_screw_02.scad>
+//include <position/position_screw_03.scad>
+//include <position/position_motor.scad>
+//include <position/position_tailPipe.scad>
+//include <position/position_rotorhead.scad>
+
+use <../../888_1004.scad>
+color([0.3,0.3,0.3])
+  888_1004();
+//use <../888_1004.scad>
+//use <../888_1005.scad>
+//use <../888_1005.scad>
+
+
+// include <position/position_888_1016_rear_difference.scad>
+
+/*
+for(x = [1, 0])
+	mirror([0, x, 0])
+		translate([0, -base_width/2, 0])
+			rotate([90, 0, 0])
+				888_1003(); */
+/*
+
+translate([250, 0, 0])
+	translate([0, 30, 0])
+		rotate([90, 0, 90])
+			translate([0, 0, -18/2])
+				888_2002();
+
+translate([250, 0, 0])
+	rotate([0, 0, 180])
+		translate([0, 30, 0])
+			rotate([90, 0, 90])
+				translate([0, 0, -18/2])
+					888_2002(); */