Qidi Q1 Pro bed leveling tension knob. Every inside tick is 2 minutes. Every outside tick is 2 minutes. Total of 60 minutes. Has access for a nut driver to loosen and tighten the lock nut. I also find it easier to change the screws_tilt_calculate macro so it uses the rear of the bed as the reference and make adjustments to the 2 front bed mounts.
The author marked this model as their own original creation.