RFS

I recently had a couple of NEM fishtail pockets fail and had to buy replacements. Of course they only come in packets of 10 (Hornby X6354), so I've had a few spare. So where I've had a Hunt coupling lose a prong I've simply reused it by glueing into a spare NEM pocket with a few drops of Loctite. And a couple of couplings have lost their magnet. On one occasion the train uncoupled and the front coupling's magnet was left securely attached to the rear coupling. Again it's just a couple of drops of Loctite but making sure the magnet is the same way round as before.

One daft one here ffrom TMC. £727.98 for a Britannia Models 4-CEP unit that looks decidedly inferior to the Bachmann model, which at least has door handles etc and can be had new for little more than half the price. https://www.ebay.co.uk/itm/266217819364

Well good luck with that!

This was a problem with early releases of the N and Bachmann revised the design to cure this. I have two N class locos with the revised tender coupling and never had a problem with either.

Here's a photo of 34103 which shows the nameplate to be red. Might not have been red all its life though!

Yes it will work either way round. The loco does not have lights.

There are a lot more available direct from Bachmann spares.

I have a number of Tortoise motors and they are extremely reliable. However, I have had the same problem as you with one motor, and the cause was due to a failure of the internal switch I was using for frog polarity. Simple fix was to use the other switch on this motor as luckily I only needed one to be working. I've seen that Circuitron say this can happen if, for example, some ballast has fallen into the motor and I'm assuming this might be the case with my failure.

Same relays as I have. Their input must be DC which is why I fitted diodes. Check the output of your CDU as I suspect its output might be AC.