I have the Van's flap actuator along with the Show Planes flap positioning system in my -10. No Vertical Power. They worked great together for the first 10 hours of Phase 1 but then the flap system started working intermittently. The control box is in the tunnel by the actuator. The system never fails on the ground, only in the air. The flaps will usually start working again when I am below 80 knots on final. Almost makes me believe that pitot pressure has some effect on the system but I know it does not! I read up on the actuator and decided to remove the flap motor and check for grease. It was fine and had no grease in it. I broke a brush on re-assembly so I went ahead and ordered a new brush set along with a new motor, but I am now wondering if the control box is the culprit and heat in the tunnel is causing it to fail intermittently. The new motor should arrive today or tomorrow but I am looking for suggestions because the more I think about it the more I believe the motor itself is not the problem. Thanks!