I think my pole that holds the dish is no good. For the life of me I cannot get the pole plumb. I can move the pole up with my hand, I used to be able to move it down but since I put on a new screw on the bottom that fixed that. I even put a new long screw in the middle of the pole and it can still move. So my question is, I have a 76cm dish can I use that pole for my 90cm dish?