Panic,
You're totally wrong in all your thinking. I didn't think there was rudeness conveyed. Just trying to enlighten.Sorry if any offense taken. Just letting you know there's much going on in the valve train than most think. You have your opinions and ideas, I have to work with engineering and physics facts. Innovation is exciting, too.I don't hold National Championships at Daytona, Monterey, Superbike circuit, build for Indy, etc,without knowing a little bit. True , I'll never know it all and I'm always open to learn, even in my 8th decade. Keeps you young. David