Nate, lose all the extra weight you can, make your brackets out of something light , and most of the H-H motors should handle it. ( H-H motor IS a diseqc motor in most cases) I pity you on the roof though , hard to tweak one on a roof, dragging up a little tv, extension cords , etc. Put it on the ground on a pole, if you can, much easier to work on. I put mine on a DG380 motor from Sadoun, pole in the backyard, and haven't needed to adjust it since I first set it up, about 18months back. It's a 90cm primestar, and I think it was around 23lbs without the heavy mount it came with.