Quote Originally Posted by booski View Post
And any more info on balancing with a scope?
Something like this:
Balancing Tool
Or you could use accelerometers...

Quote Originally Posted by booski View Post
I assume when turning shop bought pulleys its better to chuck up by the boss and not flanges?
Never hold them by the flanges - they're only pressed on and not very strong. Hold the pulley by the boss and it's sensible to check with an indicator that it's on center.