Thanks Hevster...
Actually, I have had a few complaints, I had one bolt hole for the timing belt shield that was damaged... let's see... I'm trying to think... oh, I had another person complained when I didn't bag the head and used peanuts... no more peanuts... I invite constructive criticism, but I try to give no reason for it.
I recently was doing a valve job with grandson looking on. He's quite the future machinist...
One valve wouldn't lap in right. It turns out, even with the valve head having been refaced and trued, the stem was bent further up near the guide than where the valve grinding jaws meet the stem. When I chucked the valve up in the lathe, the runout was 20mm. That valve made "two points' as it rattled home into the trash can.
If I hadn't done the lapping, that is one that I might have missed.