Im getting closer and closer to mounting my 76cm dish on my rooftop, instead of messing around with it on the ground, a few feet away from my neighbor's place. I currently have a AU-9 dish mounted on a vent pipe that seems to be doing a good job. If i were to do the same to my FTA dish (if the pipe is level & plumb), would it be a good idea? I'm considering of adding a motor eventually and i was wondering what kind of clearance i would need to get it to move properly.