Just a reminder that Hornby have made a serious error with the Class 50's circuit board and that if you plug the DCC decoder in as they recommend you'll get a short circuit the moment you put the loco on the track. I don't quite know how they've managed it (I've chipped hundreds of locos and never seen this before) but the solution is simple - plug the decoder in the wrong way round and everything will work. Note that in the photo above the orange wire is on the opposite side to the corner that Hornby have labelled as pin 1. This works very well and all of my locos have had a couple of days breaking in over the weekend, using the computer to cycle them around the layout.
Cliff alone knows what all this gubbins is for - since when did you need 5 transistors to run a loco? No wonder it goes belly up when you plug your decoder in. I'll bin these circuit boards and replace them with hard-wired connections fairly soon, I would imagine.
First I need to work out what to do with the lighting, though, particularly on the unrefurbished models which only come with red LED tail-lights. All that bulkhead detail suggest cab lights would be nice, plus I don't like the marker lights on the refurbished machines - mine are ultra-yellow LEDs and don't line up with the light mouldings very well. There are plenty of opportunities here, and plenty of space. DCC sound would go in easily and still leave room for extra weight - the loco is curiously light for something of this size...