Me and my dad build this frame. We needed a solution for the workbench that was behind it. So we made the frame that it would fold up. The pictures aren’t very clear, (the workshop is kind of a mess), but we attached the frame to the ceiling where it rotates. We also used weights instead of the strings, and we used a pvc tube to guide the weights. The chain also kept slipping so we made a bracket from an angle iron to keep it from slipping. On the top beam we mounted a led strip so the workpiece is nicely lit. I hope you like and maybe can use our ideas.