I don't think this would work well at all. If my initial mount position is off by 5 degrees and SGP doesn't do the sync after the first plate solve, then will it not be off by 5 degrees on every new target slew after that? This assumes SGP is doing a delta RA/Dec slew for successive slews when centering. Maybe it does a mount absolute slew for all of them. Do we really know how this works?
I would think the easiest way to implement this is to always do absolute slews. If SGP does a sync with each one, then mount positioning successively improves.