Designing the Proscenium

I have some ideas for how the proscenium structure will raise and lower, and turn. The major ideas involve a scissor lift design for vertical movement, using threaded rod and laser cut pieces. And the turning will be done with gears and a chain along a circular frame, in tension. The major part, the suspended cable will be a rectangular frame, with a cable from end to end. The tension of the cable will be counteracted by the pushing of the stud and end block together. The width of the frame will be strapped every 3' to prevent bowing into the cable.