MPCNC Middle Joiner M3 Captive Nut Remix

Tightening the screws holding the nut in the Z-nut-lock can be a huge PITA. Often I find it's easier to quickly dissemble than fit a wrench back there.

Worry no-more just print the test print (fast & low infill) first to make sure your printer is calibrated closely to mine (try to put an m3 screw and nut in it, make sure it works) then print two of these with around 60+% infill and ~2.8 layer height After that replace the two screws holding your nut lock with m3 screws and some m3 nuts and ti