I had several Barons coming back and the clip is loose due to a loose finial cap. When I checked my pen parts, pretty much every cap is loose in the upper tubes, i.e. I can put it in and pull it out with my fingers!! No idea why this is, but it was not with the first Barons, so maybe the brass tube was changed. As for glue, I tried CA, Epoxy and Red Loctite. The only one that gives good results is the red Loctite. Just be careful to apply not too much and remove the surplus with a Q-tip.