All that I thought I had left to do on the Kimber's shroud was to sand the nuts and glue flush with the shroud. I thought that'd be quick clean up and then I could move on to working on the magnetic holster. Once again, I was wrong...
Below you can see the set screw nuts in place on the bottom of the barrel shroud - all sanded to the same plane.
I mounted the shroud and it was looking good....
But, when I tightened down the set screws, the nuts that I'd glued into the shroud with JB Weld popped out the bottom of the shroud. I should have know that the JB weld wouldn't bond well with the acetal, but I gave it a shot anyway and it failed.
To better lock the nuts into the shroud, I re-glued them in place and then drilled a hole through the shroud and the nuts for 1/16" roll pins.
I inserted a roll pin from the outside of the shroud into each bolt as far as it would go without interfering with the set screws and removed the excess length of each pin.
Then another test mount, which was going great. The roll pins seemed to be holding the nuts in place.
And then I really tightened down the set screws and... the nuts started to back out again.
Time for a third solution. I'm going to go "bigger" this time which will add some weight, but will be way more robust than these first two attempts to lock the set screw nuts (and therefore the whole barrel shroud) in place.
Who would've though that adding some set screws to a barrel shroud on a futuristic revolver would be so hard?