[speeder]

Thanks. One of the confusing things to me is that on some engines it seems like the tolerance of the cam profile is a lot looser than you state, ie. I get different measurements depending on where on the off-lobe part of the cam I'm measuring.

Also, I prefer to set valve lash with plugs, (or glow plugs on a diesel), installed so that the compression completely seats the valve. Sometimes there could be a tiny piece of carbon or something keeping the valve from seating 100%. I'm with you on the tolerance thing and the unimportance of perfect adjustment, (as long as they are not tight), but sometimes it seems like they could be WAY off based on different measurements on different parts of cam. (Off-lobe).