LULZBOT TAZ5-6 Z-Axis Calibration tool

We have a commercial 20+ machine print farm (Taz5,6) running 24/7 and need to quickly calibrate our printers on the fly. We found trying to eyeball the Z-Axis on both sides of the steppers was not accurate enough to get flawless prints. So we created this little jig that attaches on each side of the printer's top in order to get a sub-mil accuracy for the Z-Axis on either side.

This jig is super simple to create, then zip tie it to the top of the printer (see photos). Then use either a measu