My Stab HH-90 started acting erratic last week. It would over shoot or under shoot, and some times not move at all. I pulled the motor out of the equation, and moved my 90cm dish down to the pole my 60e dish was on and manually aimed it at 103w. Next step is to bench test motor and tear down if still moving erratically. Sent from my P00A using the SatelliteGuys app!