I have not yet heard back from my earlier post on manually having to select guide star each time SGP moves the mount to a new panel. Did you receive my logs?
But after trying to assemble my test mosaic of the Heart & Soul (6 panels)..I discovered that only one of them could be merged. That is the diagonal area between the two nebulae. I had the overlap set to the 20% default but it appears it didn't "reserve" any buffer/overlap to join all the panels. You can see the join in the two nebuae panels. Just about every panel doesn't have any overlay area, yet it was specified in the Mosaic Wizard. Any ideas why? Does it have anything to do with my issue I posted the other day?