I switched from thee SG2100 to the Stab HH120. I had changed up from a 90 cm dish to a 120 cm dish, and the extra weight was causing the lighter motor to loosen up. The Stab also included USALS which made aiming a little easier, although it needed tweaking.
The downside of the Stab HH120, was the slow rotation. The little motor turned quickly enough that the tuner wouldn't decide there was no signal and stop recording.
I too, drilled the clamps and post, and clamp for the motor to the upright to put in set screws. My 120 cm dish is relatively heavy.
My neighbour's tree grew up so I can't get 87W anymore.
laurie in Ladner BC