Got back from holiday and thought nI would have another go at this convertion. I think that the problem is (but I could be wrong) that after servicing the X04 motor, I cannot get the worm to mesh with the worm gear and therefore there is a slight space between the motor and the chassis which does not let the the driving wheels to power up. It would be great if anyone in the Airdrie/Coatbridge area who knows how to get round this could contact me SammySquire[[