Yes that figures. I actually have 2 rockets but one is a very early one and this one which came in a mint box must be towards the end of the first run and looks like new. There is no smoke unit just some sheathed wiring up the chimney with a ceramic "resister" or something. As I say the motor is running fine on test and likewise when back in the chassis the wheels etc work nicely on test as well but as soon as its on the track it struggles. Must be a short or something somewhere. I will have another look tomorrow but my fingers are bigger that the train so it is a finicky one