This is a modified version of the Logitech MX Ergo Stand by darknao, that allows adjustable tilt and origin angle of tilt (which allows some forward tilt, which I find more comfortable).
When cloning, you need to make sure you get the submodules, e.g.:
git clone --recurse-submodules https://github.com/Lenbok/scad-mx-ergo-stand.git
The original STL is from https://www.thingiverse.com/thing:2640807
Under license: https://creativecommons.org/licenses/by/4.0/