Thanks mate i will give them a bell.

Thanks to all the advice above and i was thinking i was being a *&%£""*( Moron lol.

I am not sure on the exact thickness yet as i am away in Afghan right now, i will post size when i return and see what everyone thinks, iirc 138mm is the standard size i am sure it's been skimmed once, i only really want to keep the head because it has has some light port and polish wok done, i will see thanks again chaps.