So when Chris Dixon of CMD Engineering delivered the loco this morning there was at least some track to test it on.
Needless to say I'm very very pleased with it. It runs very smoothly and controllably. Although I went for the modern Loncin engine rather than the Suffolk Punch I think it still sounds rather nice. I must add the obligatory Scamp bicycle horn though to scatter any poodles on the line.
It was a bit of a challenge getting it into the engine shed at the end of the day, since the railhead is currently around 60 feet and 90 degrees away from the limit of shunt, but I managed it using the traditional approach of swapping track panels around.