I'll leave it to others to note the virtues of the various upgrade paths on the Aries, but one unmentioned benefit of the SDS will be for the first time, you'll have precise correct speed on your Aries, which without the SDS is probably just slightly off.
The Ramp down of voltage should also help with the motor, regradless of which one you have, or opt to use. Mark
The Ramp down of voltage should also help with the motor, regradless of which one you have, or opt to use. Mark