The toothed belt that rotates the dome is about 3/8" too short. GIven variations in assembly I don't really see how it could come out to an integral number of "teeth" anyway. So when the dome rotates over this spot where the beginning and end don't quite touch, the sprocket wheel comes out of the track and spins without moving. One solution for this would be to have the software not cross over this point but go around the other way, as you do with a rotator to keep the cords from getting tangled. I don't see a way to do that in the software. I've bolted the toothed belt to the dome using the technique given elsewhere here because I didn't trust the two-sided Gorilla tape. The only other solution I can think of is to cut maybe 6" of the toothed belt shift it a little so that it splits the missing 3/8" between each end of the 6" piece (3/16" each). I would put screws through the dome to secure this piece so the tape wouldn't have to bear the load. Any other ideas????