No more two-handed wing nut plus thumb screw adjustments.  These are identical in size to the original and the numbers are moved to the side wall for better visibility. 

Requires QTY 1 M4 Nylok Nut

No supports required.  I printed in Qidi PAHT with a 0.40 mm nozzle at 0.25 mm layer heights. 
 

Replaced steel coil springs with <silicone alternatives>. No more leveling drift.