There's a very accurate method of assuring all the cam lobes are on the base circle of the cam when the adjustment is made, but I've wasted a few billion keystrokes over the past 20-something years explaining it, and nobody is willing to try it. Search "companion cylinder valve adjustment" in the site archives, and you'll probably find it.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!