LOL
the snap cap insert was robbed from my pile of el-cheapo's. I had to dismantle several before I found one that fitted.
I snapped it onto the nib then pressed it into the tube ( with a dollop of Araldite) Once dry, it was a bit loose, so I had to trim the cap till it was snug. The threaded insert that holds the Jr Gent nib was salvaged from an old Exec Roller Ball pen (I think)that was knackered.
The black PR is of course from PR Princess and the aluminium was once a HV power line connection. The material was drilled first, then cut at 45deg. I mounted them on the tubes without glue as the fit wasn't great. I then warmed the PR with a heat gun and clamped it all together till the fit was good. Glued up when it was cold.
I couldn't think of a good way to do a clip ( I didn't think my wire ones matched )If it was stainless instead of aluminium, then I would have welded a clip on.
Thanks for comments, good or bad.
Have to get ready for work now