HOLY GUACAMOLE!!! Sheesh, that's too cool, my friend; but too much! It would be one thing if I had the "perfect" idea and no means to execute it; but I don't, and I could sacrifice one of my own if I were that close to it.
Also, tho, this durability issue . . . . there would have to be some kind of a threaded connection, as most people seem to have an aversion to vaping aluminum, methinks. I've thought about just gasketting out the hole for a positive post, drilling right into the aluminum shoulder (base of the catch cup) and mounting a neg post directly, then seating a cap inside the catch cup (o-rings? . . . threaded?) .. . . . . . but it would make for an aluminum atty. As soon as you get away from that, say an SS atty, it has to be attached somehow; and that means press-fit or screwed. I actually think the threads on the REO 510 are pretty sturdy; so I'd hate to go through all that only to discover that the threading I chose is no stronger.