pivot

Hi there! I'm designing a set where I'd like certain walls to pivot and I could use some advise. The idea is to have four walls making a cross, with the downstage 2 turning about 180 degrees each, and the upstage two stationary and braced/bolted into the stage behind. My thought of how to do...

I am working on a design for a show that has a large ship. Overall the ship will be about 25 feet long, about 2 feet deep and will have a couple of lightweight masts sticking up above it (attached to the back). There will be several actors standing on the "deck" (the 2' wide portion...safely...