Well it's done it again , think the threads are on the way out on the locking nut (they are made of play dough !) kept jamming up again so when I had another look I could see a nats fart of a gap between the ASAP plate and the receiver so I've taken that off and put the original spacer back on and fingers crossed it 'seems' to be ok ! So watch this space !!!!!!
Causing shit since '67 !