To be honest Bob, I have fitted quite a few of these mags (new BT-H) Even to my own bike, and as good as they are, I can say with some qualification that to set them accurately is a bit of a myth. As even though the alignment pin used to lock the shaft for timing works ok, you can usually move the shaft a good couple of degrees either way. A strobe light would be nice, but not normally dooable on a standard engine, and who knows what the retarded possition is......?? At least with a set of points, you can obtain accurate timing when they open, with fairly simple test equipment...........Cheers......Greg.