Hi All,
I'm just catching up with this thread. I recently had one, a blue analogue version. A problem I've found it derails on corners, in the case of my layout coming in and out of points. After close inspection, the coupling bars on the ends of the cabs are quite tight which appears to offer resistance when the leading bogie tries to force the coupling round a curve. This resistance causes the coupling not to turn with the bogie causing the lead wheels to derail. By putting the two ends together and dragging them across point work, the couplings lead the other round resulting in no derailment.
I had noticed a difference in speed on curves, I put it down to the cleanliness of the track
I hadn't noticed traction tyres until I saw the photos, mine are on the one set of wheels, leaving the other set for better current collection. This is probably why it sometimes stops on slower speeds running over insul frog sections.
Originally I put the two ends on the wrong way round which made the lights run in the opposite direction. I don't know why Hornby don't put the vehicle numbers on the diagram provided in the literature. This would solve this from the outset.
The internal couplings I think are also far easier to couple than the Bachmann version.
On the whole, I think it's a superb model which will go nicely with the blue dup a dup DEMU from Kernow Models, when it arrives.
Rew570