I was looking for a solution for mounting stuff to my new Petzl Vertex Vent helmet, in particular it was the battery pack of my headlamp. So i found KIL0's design, which seemed quite sturdy, i printed it and was very satisfied. Unfortunately he did not provide the CAD files, so I redraw the interface surface to his adaptor brackets and extruded an even surface for a velcro strap, because my battery already had a velcro strap.
You need the following hardware
Instructions
Tipps for your own design
The author remixed this model.
The original model was a mount for a specific headlamp, i reverse engineered the shape of the base plate and modelled a simple baseplate, which accepts KIL0's brackets.