mechBgon, congrats on the light and thanks for the awesome idea! I've got a Cateye 1000 right now, but was thinking about stepping it up a notch, or five.

I'm wondering what you had to put more work into though, the wiring (getting it ready so that it could plug into the battery), or the mount? I'm thinking that the only place I'll be able to put one on my MTB will be mounting it to the seatpost.