To install, download Robin_nano35.bin into your sd card root and put into the printer. Tested on a KP3S 2.0.
You can find my custom 3D models to install the BMG Wind extruder in the KP3S here:
https://www.thingiverse.com/thing:4814058
https://www.thingiverse.com/thing:4837063
Note: This repository is intended as a backup for my personal use, and I'm not responsible of any harm it may cause to your 3D printer.