But the valve lapping I still fully stand behind my belief that if it's making a good and proper seat then there is no reason to lap it, because my source is very credible and I trust him.
Then you're not standing behind YOUR belief, you're standing behind his (which is fine!). When you're learning, you should absolutely be getting opinions from experienced guys. Just stop pretending you are one of those experienced guys, because when you try and regurgitate what they told you, we start playing broken telephone.
P.S. "I know when and why to lap a valve" is not equal to "LAP ALL VALVES!!"
Anyway... I'll leave this thread in peace.
