Laser engraving my 1st glass on the K40 using the rotary attachment I cut on the same K40 with some modifications and 3D printed parts. Thanks to TrueLC for the original design
Cantilever Laser Engraver by GeoDave 3d model
Snap-together Manual Z-axis for cheap laser engravers by dkj4linux | Download free STL model | Printables.com