Motorized Monitor Stand

I have a corner bench that I often work at, which is impractically large to be a full standing desk. Yet, I still want the benefits of a standing desk- the obvious solution is I built a custom, motorized monitor stand. It has dual monitors, homing, jogging, and two saved positions for sitting and standing. 

Math to confirm the stand won’t backdrive and to size the motor correctly.

I did the full mechanical design in Onshape (view the CAD here). All custom parts were machined by me, as well. 
The stand is controlled by an Arduino. This takes inputs from the 5 button controller and the limit switches. The stand is powered by a NEMA 24 stepper motor through a DM556 stepper driver.  You can find the code on my Github here.