http://www.mythras.demon.nl/http://www.mythras.demon.nl/
But you wont find much information there. All I can say is that the price of a speedo is 190 euros and an interface is 60 euros. The speedos are great, the interface is suitable but not brilliant.
Standard theyll do 75A, but Kees also can tweak them up to 200A on request. They have 3 fets per leg. I know of someone who accedentally ran them at 72V for a short perriod, and they didnt blow up. If you want more info, you should probably mail Kees. He is quite busy though, so a response may take a while.