This Project is almost 1 Year old, and I can't maintain that alone. My hope was, that it would get more attention and more people would collaborate.
I would recommend going here https://www.thingiverse.com/thing:5420534 and see what they have to offer.
Also I moved long ago to Klipper (Highly recommended, you can do this with any old PC, you don't need a Raspberry)
Here you can find a website that contains an installation guide and the download table https://dave811.github.io/ATSG/