One thing I noticed is that your cables are going between the RA and DEC wires.? I would redo the cable bundle to one side or the other, based on which way the flip goes.? It's a good idea, cheap insurance, to test your setup inside.? I would just set mine up inside and run slewing tests with targets in Stellarium for future targets. For flip tests, set a target right before the Meridan and watch how the flip would go 10 to 20 minutes later.??
David Malanick