I didn't realized this was a UK based Forum. Until after I posted. The Guide bushing sleeve is what was damaged unfortunately it was crashed into and caused it to be out of round. Citizen can fix it its just a timely repair 9-10 week lead time to just get part to Citizen in The USA. the what ever the repair time is. Our machines are old L20s(95-96 Models) So I'm not sure the Air drive one would work. Ill look into it though. Thanks for your time its Greatly appreciated.