Leveling screw locker

This knurled thingy has a holder for an M3 nut (customizable) that can then be screwed tight against the existing leveling nut on a printer to hold the leveling in place a little longer. It's designed for the DaVinci 1.0a but with some customization should work on other printers.

Some notes on usage:
1. Hold the existing leveling nut in place when tightening or loosening this. Otherwise, instead of turning just the nut, you'll be turning the whole leveling bolt (though that may be useful if