Uses elastic paracord tied at each end to secure. Zip tie BH to secure it tighter. 

Recommend printing TH with supports for overhang, logo face down on build plate. 

Take the cap and O-ring off the light when installing. 

Cad file link included if you want to edit any measurements to fit other flashlights -https://cad.onshape.com/documents/001c49f5501ac4b80f7d6eb5/w/9a6537ad87acd7dc99c01cb0/e/29e7d73d768917c8244438d7?renderMode=0&uiState=69c9869b3440e9d3e3c24b80