I have the Geosatpro 90 cm with the same problem. I worked around it by just finger tightening the bracket bolts to the dish. I have to snug them up from time to time but it works fine that way. If I put a wrench on them it warps the dish. The Bracket seems to fit the dish fine, not sure really what makes it go out of shape like that. I do know it is a very light, flimsy dish, mine weighs about 13 lbs as compared to my 100 cm wingard which is 29 lbs. I have had several dishes go out of shape when tightening up the bracket bolts, I thought it was pretty common? I've been thinking lately of trying a starchoice or primestar dish, it seems to me their ribbed design would maintain the parabola shape a lot better.