And this, Meridian Flip, is the primary reason I love fork mounts. I can leave it running automated and not care about crossing the meridian other than scripting a re-focus.
I hate to think the horror of automating a meridian flip - making sure you're back on the same spot of sky and somehow getting the pointing accuracy to do that and retain a guide star.
When I do photography with my GM-8 I stick to one side of the meridian for the entire night, rather than complicate the whole process with a flip that will potentially mess up balance, image rotation, having to find a new guide star, etc etc.
Sorry, can't help other than to suggest buying a fork mount
