Was looking for a baseball cap mount for my new Sofirn HS21 headlamp for the upcoming camping season. Unfortunately, I couldn't find anything that sat far enough back to not be too forward heavy as to force the hat down. I added a small nub that allows for adjustability up and down with a postive click to hold it in place.

The HS21 shares similar physical dimensions as other Sofirn models as well as headlamps from other brands, so this may work with other headlamps. 

Note, my model doesn't include a GoPro mounting base, but the images show my mount paired with CZ2ST's GoPro baseball cap base @ [https://makerworld.com/en/models/438759-go-pro-hat-mount?from=search#profileId-344283](https://makerworld.com/en/models/438759-go-pro-hat-mount?from=search#profileId-344283).  As it is a standard GoPro mounting, it should work with other GoPro-based mounting bases.