Hello everyone, I'm looking to build a large rolling unit for actors to climb on/walk thru, etc... This is my second time designing for this show, and the first time I used some standard scaffolding and covered it on all sides. It worked ok, but it was loud, squeaky, clunky, etc... I'd like to build one from scratch...so basically I'm looking for ideas about how to build it from scratch, make it stable, and keep it's functionality. I need to have two doors, it needs to be tall, it needs to be climbable, and people need to be able to stand on top. It needs to roll, the wheels need to be easily lockable. It's a tall order... just looking for ideas. Check out the picture below. Thanks!