I have printed the parts for the 25mm version but the holes that will trap the M3.5 nuts (never heard of M3.5 btw) are way too big even for M4 which I have bought and was planning on using. The nut traps are perfect for M5 though so I thought I could drill the holes for the bolts a bit bigger and go for M5 instead. Would there be any problems going for M5 that I am not considering? Would be nice to know before I potentially destroy the printed parts. I have read the *** part on the parts page but sourcing the imperial bolts would be more troublesome than drilling out the holes for the M5 bolts.
Been planning on building a MPCNC for years now, bought all the pieces a long time ago and it will finally happen now when I am on vacation. I will send a donation to show my appreciation when I have put it together.