I had one of the probably quite early one of these with the horrible Band Drive. Ran like a Dog due to no pickup on the Trailer. So I decided to re hash it to a Battery Drive. Made connections between the two units, battery on the Trailer hidden by a Box. Using a DPDT Switch set up and of course weatherd it. Ran very sedately till the band gave up the ghost. So the Trailer now acts as a Pull at the Rear of a Train thing ala Welsh Highland. The driving bit Dumped by a pile of scrap as below in my Silberhutte Station Yard:-
Below Tex gets a ride on the revised Loop Section behind a Passenger Train en route to a PWay Job out on the Line somewhere. Probably to fettle up the revised Track on this relaid Loop.
On this you can see the Battery Box, all the connections have been stripped out. I have all the motor and bits in a bag somewhere. Saving for a Rainy day or boot sale!
JonD