Wow that's a beast!
I got these Triumph Adler keycaps - PBT, MX, dye-sub (except backspace which is doubleshot, Cherry profile. Weird layout as it actually ends up being 0.5u wider than a 60%, and the mods all have oddly placed MX stab mounts. And yeah that's a, 8u space
)
Really nice keys though, I think I need to grab some GMK mods, like a CMY set or something, and fit these up on a 60-65%.