Purchased early crest one today, seems to run fine forwards, possibly a little noisier in reverse.
Had the keeper plate off, to find another underneath with the pick ups on, took that off and reveals 2.5mm driving axles.
Re assembled, and noticed that the rear axle would not revolve, so backed off the keeper plate screws half a turn, and ran ok again.
Wonder if the issues mentioned above relate to these screws being too tight? Just a thought.
The engine tender drawbar looks interesting......apart from being rather long in my opinion, it seems to be permanently wired!