I'll be keeping a close eye on things, regular compression tests and plug chops to see whats going on.
I think I've done what I wanted with the head for now. I'd say I've given it more of a polish than anything
Its far far from perfect, but also a lot better than what it was
one of the marks is still fingernail deep, but I'm reluctant to go much further without taking it somewhere knowledgeable with two stroke machining. I'm happy enough to fit and find out for now