I built a Nyquist from keeb.io parts (and zealios 67g switches). It was mostly to learn how to flash QMK to a microcontroller, solder the components etc., but I used it for a few weeks and it was surprisingly comfortable, better than my usual topre novatouch.
How do you find 67g switches? I built quefrency with 67g Zilents and while they are comfortable I wonder if they are a bit too stiff for fingers joints health
I like them, but I have a somewhat soft typing touch and don't bottom them out (they're harder to bottom out than most switches, too). I don't know if lighter switches (which are likely going to be easier to bottom out) might be better for joints.