I am using a Phantom which I finished building a few days ago. Phantom PCB, blue aluminum plate, grey TEX aluminum case, a Pexon cable and DSA Dolch keycaps. The switches are Cherry MX blacks that I harvested from a Wyse terminal board with a date code from 1986.
I was disappointed after getting everything together that there was a good bit of flex with the PCB / plate inside of the case. axtran recommended a sheet of Sorbothane which has worked wonders and eliminated all of the flex.
I really, really, really like these vintage MX blacks. I like them much more than the KUL with MX clears I
have had.
Here's a bad photo of the keyboard.
And here's part of the Wyse donor board.
I'm not saying this is endgame, but this build is wonderful and I don't think I'll be acquiring any more keyboards for a while unless I come across a killer deal on an IBM beam spring or whatnot. I've got this Phantom, a few Model M's (I started collecting those in the late 90s and have recently sold a few), a Model F, a 55g Realforce and an Apple M0116 with orange Alps that's been in the family since the 80s.