So, I settled on adding acorn nuts to the ends. I like the solution, but the final part came clear when I saw the feet at the North Texas T-Track group. They are using standard hex nuts, but epoxy gluing them in the screws.
So, I adopted the epoxy idea, and am epoxying the acorn nuts to the ends. Much better, in my humble opinion.
This afternoon, I've completed my second set of 24 set screws. With the ubiquitous 1/4 - 20 threads, of course, per TTrak guidelines. I've used 2"
and 2 - 1/4" set screws. I tend to favor the 2 1/4" version. Just something
personal.
The first two dozen are already installed, and about half of these are designated for specific new modules under construction. After that, I need to survey which older modules will benefit most from being upgraded.
I have plenty of acorn nuts. So far, only about half of the bag bought a while back have been used. So, another buy is in order. I can order boxes of 25, so I'm thinking two boxes will be about right.
Arlo does the definitive "City of New Orleans," for what my opinion is worth.