Scissor lift meshanism for your scissor lift needs. I use it to hide my projector in the ceiling, when I don't use it. They dont take any load of the projector, it is hanging in the wires, and is just stabilized by the scissor. Video of the whole thing moving: http://www.youtube.com/watch?v=kIGKIQXSbygPrint one of each slider. Two of each slider pins, four in total. Two slider pin spacers. Then as many arms and rivets, you need. Use glue to fix the rivets.