I love projects like this. I am one to fiddle around in this manner, but electrical stuff is waaaay over my head!
My perspectives on this project would be: adding the weight of the alternator, pulleys, belt and housing, to the bike. I also would be concerned about the alternator being exposed to water, and the possible damage it could do to the unit, and any devices hooked up to it.
Aside from my concerns, nicely done!
(I do need to ask one question though. Have you ever dropped your bike, or incurred a laydown? All of your lights do aid in helping other drivers/riders see you, but they also empty your wallet kind of fast at replacing them. I personally know this from experience! That's why I got rid of them!)
2007 DL-650 (111,000 + miles)
"A word grows to a thought; a thought to an idea; an idea to an act. All the pieces are put together, and the whole is yours."
1942, Beryl Markham: "West With the Night"
"In most men, there lurks a lesser man, and his presence smells in the the sun."
1961, Ernest K. Gann: "Fate Is The Hunter"