v2: after some use I noticed that the old version is a bit hard to pull the flashlight out of. So I increased the offending clearence and added a bit of a rough surface where the part meets the fabric and it improved a lot.

Just a simple clip to hold the edc27 from nitecore on the the "rails" on my pinqponq backpack for hands free operation. It is slightly angled up so it should light more towards the ground. 

I needed to drill out the hole for more accuracy but that might depend on your printer. I personally used white PETG so it is not that visible on the strap.