The model I ran was only a "small" one at 109 pts - but having to build in delays so that the dome has time to travel made that model take close to 2 hrs to do.

I'm not sure whats up with SGP wrt dome control - but it always waits until the scope has stopped slewing before it evens begins to think about rotating the dome. Ideally both should be moving at the same time. I think this is what happens if using the SkyX (both moving at the same time) - but I don't have the SkyX.

I'm slewing at 600x which seems comfortable. Are you in a dome?