Yes its a nice little loco Ian and the ballast train suits it well. It looks good with conrods

Making two locos was always an option but I'm glad I've gone down the road I did (with two locos awaiting contruction it I botched things up

).
Anyway, I tried to post yesterday's work and today's testing - wouldn't work so here's another go! ....
Shopping this morning - but back in good time to test the (now) slim-line "thing" and find a fault (x 4!).
Yesterday I managed to (quite easily) to alter and fit the side handrails. The front ones are a different kettle of fish. With everything screwed down, cab floor firmly glued into cab and used for securing the latter (two bolts through floor), air tanks cut to size and fitted, lights reconnected and, last (but not least) cab roof cemented in position, I needed just to make sure the lights worked as before.
I also fit the die-cast step modules, plonked the loco on a couple of R1 curves and noticed there might be a problem. There was! The conrod ends fouled the steps and actually knocked one set off on test. So I removed them for further testing purposes and everything else was as it should be. Need to make some new steps after I have done the end handrails.
I tried altering one of the originals - cut the correct width, stanchion seperated from the off-cut, and soldered on using Bakers Fluid. Great! Then I cut the middle vertical and centred it and that too soldered up OK. Then I noticed there was a slight bend in the bottom of the soldered-on stanchion (which must have been there before I soldered it). Never mind, out with pliers. However, monkey metal may bend, but it doesn't like being bent back!
"Oh dear" I said - "30 minutes of work down the drain" or something like that. So I'm now going to make them out of brass.