Bob no one is saying you are wrong. No one is attacking you or your Experience so you need to stop taking it as that.
Everyone is free to express their own opinion. You gave yours and others have given theirs. You have had 25 years of experience and my machinist and close friend has at least that many years of rebuilding heads and engines and he swears by Hardened seats in the exhaust side, and has never once had one drop out.
We all appreciate your input and any knowledge you can share with us all but don't get upset if someone disagrees or has a different point of view.
