I'd like to see how you mount your ducting, both to the ceiling and against the wall. Should I make a bracket that matches the curve of the pipe side, or isn't it necessary? My pipe main will be up against the ceiling. Also how stable will a drop pipe be in the middle of the room and how can one stabilize it. I may have three foot drops of 6" pipe before transitioning to flex, not sure yet. I believe I read that one should put short screws into the verticle connections to help hold them.