I couldn't find firmware that was what I wanted... so I compiled my own 🤓
To install, format a micro SD card with FAT32 and place the .bin file in it (found here https://github.com/MIfoodie/Ender3Firmware/releases). All you have to do then is place that card in your printer and turn it on.
Features (that aren't in the official build!):
- Marlin 2.1.2.1
- Z Probe Wizard
- Deploy/Stow probe buttons (found in "Motion")
- For the 4.2.2 Board with CR/BL Touch
If you want a different build (for example: a different board, no bed leveling, filament sensor, etc) submit an issue!