Don't know what I'm getting into, but I'm thinking of making my own out of pieces-intended-to-be-used-in-flashlights. I'm not really impressed with the price/performance of stuff that's available... I had a B&M that failed halfway into the winter, and starbike refuses to replace it or even respond to my e-mails.
My hub is unregulated, but the circuitry I'm planning on using does regulate.
Comments? Am I insane?