I’m going back to a guide scope from an OAG for simplicity and it got me thinking… What if you could have SGpro do a plate solve say every thirty minutes (have an option for time) and restart the auto guider?
I know flexure can be an issue. It was one of the main reasons I started using an OAG. I know this would be useless if you were doing extremely long exposures but in 2-5 minutes, flexure causes no noticeable star trailing. At least for me. I only noticed it when stacking my images there was drift between images and I had to crop large portions off because of the lack of overlap.
Just a thought!