No i haven't altered it in any way, yet. It currently has a 6v limiter. The reason why i want more voltage is that I need brighter headligts. The lamp fitted there now is poor. There are other reasons aswell, all the modern equipment is 12v so it's gettign more and more difficult to find 6v stuff. I'm also going to design my own PIC based controllsystem for various accessories, leds and other things. I also think that it is a waste to throw so much energy down the drain all the time. With a 12v system I could also fit an ass-warmer
so it would be warmer to drive during the winter.