Tony Lum queried, rightfully so: > Huw, how do you determine where +20 is? There's no mark or anything or do > you have a flywheel with degrees scribed on it? I have an advance timing light (is that what they're called?). It has a knob on the back to dial in the advance when looking at the TDC mark. Sears. -- Huw Powell http://www.thebook.com/human-speakers/audi-main.htm