Hi mate. Sometimes symmetry (either sort) breaks robotics parts being able to move. Try placing the moving parts down with no symmetry. Your test craft looks rather sturdy! Everything is quite wobbly for me in the current version. you can autostrut the moving part to root, but don't strut anything after the moving part. I hope it pays off! I made a similar craft a while back with near future and OPT parts. had a great time making a replica of 'Serenity' that topped out at 400 parts.