Picked up a very well used/toured JCM900 cab from the original owner yesterday. He bought it new and said the back has never been off. I just popped the back off this morning to verify everything was good, and noticed that the center post wasn't tight against speaker baffle. It was hanging on by the one screw coming in from the front of the baffle, and between the post and baffle was about an 1/8 inch gap. I don't think any glue was ever applied at the factory. Anybody else seen this in these cabs?