It's also very easy to use Ruby script to get the two pieces to scissor every time you give them the finger. If you are new to Ruby, you can see that the RotZ command rotates around the Z (blue axis) I've made the top tube a dynamic component and placed its axes right on the pivot point, directly above the origin. The function that is displayed, simply rotates the tube anti-clockwise by 60* every every time it's clicked. The subsequent click rotates it back to zero again. scissors.skp