Steve thanks for your help on the phone tonight. I finally managed to get the little strip of metel shaped like a fork back in place, fiddley little bugger! Managed to find a drill bit which fitted but do not have a vice to grip in to cut it. That being said it works perfectly now even without the pin but I'll either order a replacement or do as you say and get round to using a cut down drill bit instead. I still wouldn't have a clue where that strip of metal came from unless you had told me, thanks again for your help.