K1 Series Upgrade Accessory Kit User Manual
K1 Max CFS Upgrade Accessory Kit Operation Video
K1&K1C&K1 SE CFS Upgrade Accessory Kit Operation Video
How to distinguish if K1/K1 Max hotend kit is compatible with Multi-color upgrade kit?
Upgrade Kit Modification for Printing ABS Filament
K1 Series Upgrade Accessory Filament Loading Issue: Motor Inactivity or Reverse Retraction