I'm having trouble. Seeking advice. I installed the rotation motor, tested it pretty thoroughly, and it worked well. I gave it many complete rotations in both directions. Then I installed the shutter motor, and it worked very well. I should have known it was too good to be true - the addition of the shutter motor must have affected the shape of the dome. Now when I rotate the dome, the track will move away from the rotation gear, specifically when the shutter motor is passing by in the area of the rotation gear. I have adjusted the rotation motor as close as I can get it to the track, but the problem persists. I'm stumped. I guess I might consider the spring modification to maintain tension. I was hoping I wouldn't have to go there. Does anyone have any suggestions?