Thanks for the replies!
It was cycling really well, maybe too well to be honest, there seemed to be much more force in the blowback than there had previously, I have never had the thing open but any surface areas or reacheable moving parts where nice and clean.
vfrkid: I will try to get the pin out and strip it, suppose its not working at the mo so not to bothered if I make a hash of stripping it / putting back together.
One thing I had noticed with it was that it used to very regulary cycle to BB's in one blowback action or sometimes non. Since I noticed the blowback action being much stronger that seemed to of fixed itself.... untill it broke!
Thanks for the help.
Denno