Please look at the previous page, there are more postings about the jamming. And no, a half tooth will not help much, I tried this first believing it would work. But I could easily find positions of quadrant / small gear orientations when tooth tops would jam, just try for yourself in small increments. The real trick is to grind the first tooth on quadrant to a pointy top, half tooth is allright as well when pointy . So then you´d have to be extra careful to get pointy tops to jam, unlikely with some grease on gears. Also watch the video clip, I had trouble to get gears to jam when all is pointy on small gears plus first of quadrant - and that was the exercise.
Vic
Vic