I dont notice any wobble in flight. If you do I think its too much rudder or elevator.By the looks of that tail that might be you problem.That tail is HUGE!!!!!!!!Last night I build a cg jig and my cg wasnt as far back as I thought.It was at 3 9/16.Now its 4.5. Ya baby the next flight is gonna be wild.hopefully it will start to waterfall and elevator.