I tried it on another switch and got it to fit and once it had been done a few times it worked fine.
I did discover a minor issue that hopefully yohanskee can fix in his mold for next time.
It seems the inner cast is such that the keys can only work on switches with the logos on top. Both the keyboards I tried at first have upside down switches (anne pro and pok3r) and I couldn't figure out why it would get stuck on both keyboards and not on the switch, then i realized i was implicitly using the switch logo up every time. Flipped it over and sticky switch. (For kicks I also tested with a box switch, no issues, it was actually harder to tell it was upside down too, guess the housing shape is different enough). I imagine I could probably shave the inside down a bit with a razor, but I'm not sure I'll bother.
Anyway, orientation issue aside everything else is great. Even the single color caps look impressive because of the detail of the design. Will definitely buy again (or at least try... we all know how that goes
)