Simon,
not surte about the wedge concept, other than the balance/imbalance aspect.
I tried a motor system for one of my dob bases, and loved it. I thought initially it would make my GEM redundant but logic has prevailed and I will retain the GEM, and am selling the drive system (check the For Sales Forum).
Even if you are a completely visual observer only the ability to push a couple of buttons to track is a boon.
Gary
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