I can't remember how to embed an image, but here is a link to it: Picture - Modifed H31
All I did was create a head band out of 5/8 velcor loop with a short strip of elastic and short piece of velcro hook.
In the front the light is attached to the headband by using the light clip (that comes with the light). I created a short pouch that the clip slides into. It's nice and secure (I had it out last weekend - and it worked great).
The whole thing weighs 1.9 oz - a full oz less than the stock headband set-up.