Qidi X-Max Leveling Nut
thingiverse
Ditch the tiny knurled adjustment nuts and get something you can get a grip on! These knobs make small adjustments easier and the provide some visual references for partial turns as well. They are designed to have an M4 locking nut inserted into them for positive bed leveling adjustment and being able to hold position without jam nuts. Adjust and then just let go. They will probably work for other printers as well and the hole and hex recess could be modified for other screw and nut combinations.
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