Geek, 3 questions:
1. Does your helmet have the mount for your taillight? If not, how did you mount it?

2. Do you keep the battery attached to the helmet when you ride, or do you put it in a pocket?

3. That looks like a NR HID, is that correct? If so, does it have a fuel guage, and does it ever go on the fritz? (My NR DE Halogen is worthless, but I'm thinking of going to a helmet system rather than my handlebar/basket system.)