Laser Noob: Getting Started With The K40 Laser | Hackaday
The complete idiots guide to Chinese "K40" Laser Cutters for Wargamers - Wargaming3D
K40 Laser Engraver
Upgrading a Laser Cutter with Cohesion3D Mini and LCD | MCU on Eclipse
Amazon.com: OMTech Autofocus Sensor Kit with Leadshine Stepper Driver and NEMA 34 Stepper Motor for CO2 Laser Engraver, Cutter, Engraving, and Cutting Machines, Automatic Motorized Z-Axis Up Down Focus
Amazon.com: Cloudray Ruida 6432 Controller K40 Series Upgrade Kit for CO2 Small Laser Machine Engraving (K40 Set)