My 1.2mtr Gregorian was mounted on the wall using 2 X 24" K nd 1 X 24" T bracket and due to the house renovation I had to dismantle it.
I am planning to replace the 24" ones with 36" ones as the dish touches the roof when it swings from left to right and vice versa.
I am hoping that the 36" will be able to sustain the wind load and would be safe.