Woodie, thanks for the kind words and encouragement,
and I am intending to change the trucks for either Forney trailing trucks of which I have a pair or Slimrails TK3 freight trucks -
if I can still get them!
Thanks Si and I'm now getting more of the boilertop bling in place with the addition of the rear cylinders' steam pipes made from laminated styrene sheet and the cable with a plaited cotton shroud that powers ceiling downlighters, a boiler top bell, a headlamp in front of the smokestack, ironmongery added to the domes, the original Mantua whistle and valve moulding, a Westinghouse air pump not yet plumbed in and the number removed from the cab sides.
Everything is just perched on board at the moment as I don't want to fix anything until I'm sure it's right and it will be easier to mess around with the boiler adding speakers and DCC wiring without risking knocking off some other bits.
Removal of the cabside numbers was managed with a very light sanding to loosen the top surface and then patient rubbing with an IPA soaked cloth and the use of fingernails. Quite effective in the end! A quick spray of Halford's satin black acrylic covered up any minor score marks.
I'm getting closer to needing to fit a decoder somewhere, most likely in the tender, so I'd better get on to buying one and I can then think about any other wiring that will be necessary. I had thought of fitting the original Mantua's small head and tail lamps as marker lights onto the pilot deck but this might be a little over the top. I'll see how the mood takes me in due course.