Hi Dinodog, many thanks for the reply. I've just checked it with a meter and yes you're right it is in line, it only makes or breaks the two wires. The main thing that's wrong with the Stuart as it comes is that it has no proportional speed controller, it's all or nothing. I'll get round to puttng something different in later, probably a 6 channel set-up. Oh, I also have a Tamiya full option KT and a HL Tiger amongst other things.

Many thanks, Les.