I have never tried an Ergodox, but my main keyboard right now is a Redox, which is similar in terms of thumb cluster placement. The thumb keys gave me trouble a

I have never tried an Ergodox, but my main keyboard right now is a Redox, which is similar in terms of thumb cluster placement. The thumb keys gave me trouble at first, but I replaced the switches with ones that had a much lighter spring (35 cN, I think?) and since then it's been fine.