Sounds a good idea!
I've managed to fit the Narrow Planet 3D printed smokebox door. I had to grind a bit of material out of the back to clear the charging plug, but it now fits snugly with some black tack holding it in place. The cab is a lot tidier with less wiring now the switch has been relocated.
The saddle tank has been repainted and the loco reassembled. I think it looks quite smart now, really pleased so far.
I'm debating putting a TR-style wooden door onto one side of the cab, my intended model is of the Skarloey Railway in the 1940s and 1950s - the 'lean years' - hence the red dome and not a shiny brass one.