Thanks Chuck. I wouldn't imagine Scott would want to take a "trade-in" on used, old-style motors, so yes, mine would be worthless, except as a used sale to recoup some of the massive cost of the upgrade. I suspect my medium-term plan will be to just stay the course, use the Gemini system as is, and if any part of it fails, I'll probably implement an OnStep system instead (I've already built a few systems on the bench for fun). Wide choice of powerful motors which can be easily "tucked-in" and at very low cost, though I'd still be missing the SLW capability. I'd love to see some hi-res photos of how it is done, to get an idea of what would be involved in DIYing it.
Jeff
