Following the scam story about the DJ Clayton going to be a Dapol announcement at TINGS by a Troll on the N Gauge Forum last month, I have to say that any post that appear to be "exaggerating" or "over dressed" is getting a healthy degree of scepticism.
By the way, if you put a worm on a coreless motor you need to limit its play as a coreless motor can only rely on the motor case as a thrust bearing in one direction. When the worm is forced towards the brush end of the motor case it sticks. this is what happens when forced forward. The fix is a brass tube to brace the worm against the motor case, which creates the other thrust bearing.
What interests me is that seven models passed through someones hands without this being spotted or understood.