When I got my L2D, I tried the TwoFish bikeblock but wasn't happy -- it didn't fit my helmet well and slipped around while riding. So I played around and came up with the mount below which works much better for me.

I used the large O-ring that came with my Dinnotte headlight, plus a plastic wine cork and a small O-ring from the hardware store. The big O-ring goes under a bar on the helmet and wraps around the front and back of the L2D to hold it on. The cork raises the front, and the small O-ring slides back and forth on the rear of the L2D to adjust the angle.

It holds its angle very well and is surprisingly secure. Last night, I didn't duck enough coming into the garage and banged it against the garage door as I rode in. The big O-ring sprung the light right back into place no problem.

The helmet I'm using right now is my commuting/winter training helmet, a Bell Metro. It'd take a little more surgery on the cork to get it to rest well on my Pneumo.

You should drink more of that wine with the excuse that you are manufacturing a new product.

Excellent! Thanks for the tip!

I really like that mounting idea. With one of the newer composite "corks" in black it would even look elegant. Is the small o-ring just to prevent scraping?

Hahahaha - Carbon Fibre cork FTW!

You read my mind on the black cork. The one I've got is the newer kind, but the fake-cork color is a bit weird. Next time I get a bottle I'm going to look for one in black.

The small o-ring prevents scraping, yes, and it also gives a little grip to keep the rear from sliding around. The main reason, though, was that the helmet is tilting away from the light at that point, so I can adjust the angle by sliding the small o-ring forward and back.

[QUOTE=The main reason, though, was that the helmet is tilting away from the light at that point, so I can adjust the angle by sliding the small o-ring forward and back.[/QUOTE]

The *other* kind of night riding