SmartALU Second Z-Axis

The SmartALU has a poorly supported build plate, this is a relatively easy fix.

[https://youtu.be/fHlEnPQbIsw](https://youtu.be/fHlEnPQbIsw)

Requirements.
1x Lead Screw, 8mm Diameter, 8mm travel per revolution.
1x Nema17 Stepper, 1.8 degree 0.45Nm or more.
Some m3 bolts, m4 bolt and T-nuts.

Install:
You want to drill a 10mm hole approximately 310mm from the edge of the current z-nut ( 315mm) from the centre point. This should be outside your build area!

Drill two additional h