An internal M4 Nylok nut keeps these Thumbwheels right where you set them to with no factory locking nuts. These work as designed with both the Q1 Pro and the Plus 4. For the Q2, they are the same, except you don't need the brass tubing as the Q2 bedscrews are shorter.
LBRY Tags: qidi; q1 pro; thumbwheels; tramming; bed level