This is how I do it. I spin the cam loosely on the flywheel to get the biggest gap in the points. Adjust the points to the desired gap. Then I go and put the piston in the desired position before TDC, whether it be 1.5 or 2.0 mm. Then I loosely turn the cam so that when it makes contact with the points and they _just_ start to open, I leave it there. Give it a whack with a hammer and a socket to "set" it. That's all I do. Sometimes it doesn't quite work out and I have to do it again but it seems to be close enough. How are you doing it? I'm no expert at Mobys but that seems to have always worked for me.