Ya, I would think the same. But I not knowing how the mount modelling is performed in the hardware and not knowing what they're abstracting from us is the mystery.
With the Gemini you can likely try a couple different things:
- Turn on "Sync Performs Additional Align" with a model in place.
- Disable "Sync Performs Additional Align" and do a Cold Start to clear the model.
1 will essentially allow you to build and redefine the model as you go. 2 completely disregards the model.
Also it's probably worth turning on the "Mount expects JNow" (can't exactly recall what it is...but I believe it's something like that. If I remember correctly the Gemini controller ALWAYS returns JNow but if that option is disabled then it will assume J2000 for the sync and slew. SGP will query the mount and ask what format it's expecting...but ASCOM only allows for a single epoch and it seems that the Gemini can potentially allow 2 epochs (one for sending and one for receiving)
Thanks,
Jared