Install BTT SFS 2.0 on your K1 printer!
I have this currently installed on a Manta M8P, apparently it can be installed on a stock K1 as well - use this link for reference:
Here is an install guide for reference:
The author remixed this model.
I added mount locations to install the Big Tree Tech Smart Filament Sensor 2.0 on the K1/K1C/K1 Max.