“O” ring head gaskets are “sketchy”? Who told you that? There are plenty of MX bikes that have been running them for years without problems. Given a choice between a stamped steel gasket and O rings, I’ll take the O rings any day. They won’t leak or be problematic if they’re installed correctly and are of good quality. As for a milled, re-designed stock head………………………I don’t see it as being a viable option for a modified engine. Good choice Mike. Where are my pistons? Porting is almost done.