Thank you David.
I'm well aware and grateful for your earlier kind offer of assistance and if I reach an impasse I'll be in touch.
It's a coincidence that I've just run in to my first problem. Definitely of my making! The tender side overlays now have a quite reasonable curve to the top, as designed but created by me.
Viewing the drawings it looks as though that's all that is required as the sides appear flat but I now find that there is a sharp curve - more a "return" - at the very front, cab end of the prototype. I've spent most of this afternoon considering ways of creating this. I suspect that it was not a consideration during the design although the footplate seems to have a "channel" marked out for the tender front to follow.
So far, employing the brain cell, the only answer I've come up with is to clamp a piece of small diameter - probably not more than 3/16" - ground mild steel in the vice, lay the tender front against it and beat the hell out of it until it bends to my command. This return is only over the final 3 or 4 mm so there's not a lot of metal to be playing with. I strongly suspect that the BMS will bend as well though, as the section is so small.
In the opinion of the audience is the gentle ministrations of the universal tool the best answer or are there other suggestions? (The universal tool has a rubber or softish plastic business end, or there's always the big bertha but that's probably far too aggressive).
Brian
PS. I note that Warren's tender has the return, so he dun it!