Just thinking about that last little bit, I realised that technically, since the motor coach has no lavatory access, while it was running around on its own it was a 1NOL !

Anyway, I have now rigged extra pickups on the trailing bogie of the motor coach and, unusually for me, run the wires very neatly through holes drilled in the upper corners of the compartment partitions.

Next, I rigged a simple hook and loop coupling system using some stiff brass wire drilled into the floor at right angles to the coupling plane. This tended to swivel a little initially so a notch was filed into each headstock and the couplings seated a little deeper into the floor; this was very successful, although the distance between coaches is a little greater than I would like, it negotiates the tightest curves comfortably with just a little clearance between the inner corners of the carriages (no variable couplings here, although it would be nice to use the system Hornby and Bachmann use on their units).

A little oil on the motor gears and axles and off it went. Tweaked the CVs a little to get smooth and consistent starts and it has now been happily trundling around for an hour.