Kind of a long shot, but I've always wanted one of these guys and have never seen one for sale in the states. No luck finding a schematic (or even a mention on FSB), just a few gutshots from googling:
http://crimsonred666.up.n.seesaa.net/crimsonred666/image/20080804drivesta-05.jpg?d=a0http://3.bp.blogspot.com/_gw2nyNup_xg/TNdYvRg84rI/AAAAAAAAFos/LuTE0JWAMuY/s1600/DSCF1196.JPGmy eyes aren't great, but i'm guessing that'd be a LF353, and the toggle switch is for diodes? anyone know more about it? thanks!