The plastic Armytek holder is great on an armytek light. I like it more then the armytek rubber holders for most things.

The plastic Armytek holder is not great for a Skilhunt H03. The flat spots on the H03 drag when you adjust light up and down. Not sure how much you adjust your light. It has kept me from using mine in the plastic AT holder.

I get some time I will do some more playing with some other headbands.

I use to have one of the Nitecore like above , and if I remember correctly the elastic rings float. You could use 2 one on each side of the head strap.