@Battery800 and I were able to get a successful maiden flight of his Cormorant II yesterday! The left motor was spooling harder than the right, which is the probable cause for the issues encountered. After recalibrating both, it had a successful maiden! The split flaps seemed to work well at providing extra drag for approach and landing, and had very little associated pitching moment compared to the fowlers I have on mine. We maidened on a small 3s, it should really come into its element once it's put on 4s.
@Battery800 nice meeting you and best of luck with future flights!