I’m building the MPCNC Primo and very much enjoying the process. Something I’ve come across while attaching the nut for the T8 lead screw to the core, is an issue with the size of the holes for the M3x10 screws. The screws themselves appear to be fine; they fit perfectly in the Nema stepper motors and a check with the calipers shows them to be 3mm in diameter. At first I thought it might be my printer, however checking the source STL shows the holes in the core to also be 3mm, which means the screws will not grab the insides of the holes. I could use loctite, however I’m concerned that the constant up/down motion will quickly break it loose. I could use something stronger, but then I’d never be able to get the screws undone.