Lime is a super compact & simple extruder. The gears are from the DXC extruder by Phaetus, Devil Design, and Creality. Lime has only 3 parts to print, and none of them require supports.
CAD: https://github.com/ProtonKicker/Lime/tree/main/Lime%20Extruder%20-%20ASM
Lime looks like this👇
K1's gears might also work, but I haven't tested them. Note that the DXC gears have helical grippers for the filament. It is probably superior to the ones on K1.
Feel free to make modifications to this design and ask for different formats of the CAD.
Link to DXC's github: https://github.com/Phaetus/DXC-Extruder, and special thanks to DXC's creators~
Go to https://github.com/ProtonKicker/Lime/tree/main/More%20Pictures for pictures of Lime on Voron 0.2
Initially this is a color swaping extruder
See X thread for my initial ideas and how this project went on a tagent and become Lime: