Excellent. Having now diagnosed the problem with mine, I've had it successfully hauling ten bogie coaches. In real life that load would have had Radials double-headed. Briefly, the model runs fine on my home layout (Peco code 83, facing and trailing points, one reverse curve, no curved points). had it hauling 6 bogies no problem. On the MR test track it doesn't like the curved turnout. Somehow, the rear truck play allows the square boss to slip out of the slot in the bunker floor and it then rubs against the bunker floor, lifting the rear driving wheels just enough to lose adhesion. The rear truck movement is not smooth and the clearance seems tight in places. I won't be taking it to bits to cure the problem as it runs fine on my home layout which is where its going to live. Goes to show that our test track does its job, though, and finds the faults. Anyone who has a similar problem will need to either tweak their track or take a file to the rear truck to make it operate smoothly. (CJL)