I once alluded to pulse-modulating the motor power, but nobody seemed to care.
Having experimented with model trains and my own pulsed supply, I can attest to their usefulness! -
We crept along the engine below the visible motion threshold.
And at full torque!
Only way to see it move, was with through closed-circuit video, with the camera aimed at a dust mote on one drive wheel!
The problem with moving dishes, is that there is currently no controller using PWM technology on the market.
And making one from scratch, would be a tall order.
edit:
I'd like to go one step further.
For an H-H motor setup on a BUD, I'd like to use USALS.
It'd just take setting up one variable: the number of steps per degree.
The rest is all left to the receiver to calculate (if I remember correctly)!