Further to my recent camring problem . Getting a good ring of uniform profile and similar thickness on both the lobes, i removed and serviced the points. yesterday i set too ,and fully retimed the engine, then the mag, according to the handbook.then set the points to the quoted openings, on the n/s cyl. Rotating 180* to the other lobe for the o/s cylinder. i found that the points again were not opening, UNLESS the adv/ret, lever was moved fully on. HOW could this be ?? exactley as i'd had with the old c/ring. 2 hours after i'd finished, i got a phone call from Dave Lindsley ( mag services) to tell me it looked like i had got a magneto that had come from Lucas in a batch that had had the camring housing bored slightly eccentric to the armature centre line. Hence the run out,that prevents one from getting equal points openings, also equal ign.at any stage of advance/ ret. After all my work to get this running this year, what a kick in the cr ****tch. Has anyone in the club ever come across this before ?and what please did you do about it?. Change the end plate of the mag, IF you could get one,or go electronic ?? my brain is going retard now, i'm sure. Denis. s