RE: saito rebuild?
I,ve had a good look guys, i think a threaded insert, (helicoil) might not work, it would need a lot taken out of the hole before it had a clean shoulder for the locknut to tighten against. Thanks for the idea though. No, i,m gonna get a new cylinder and have a go myself, i got nothing to lose, worse case scenario i have to send it to a dealer for reassembly,lol.