Thanks for the photo of D&RG 92. Unfortunately, I can't afford to spend $3000+ for a glass print, even if done by Jackson.
Now, if this was D&RG 93, it would be very interesting. No. 93 later became RGS No. 36. As far as we know, when the RGS bought No. 93 it still had a diamond stack and short smokebox, per its original build. This is the configuration we are emulating.
Its straight stack and long smokebox are apparent in the only known (close) photo of the engine, taken some time after the head-on collision with a work train in January of 1892. Evidently, there are no surviving photos of RGS No. 36 in its original configuration, which lasted less than a month before the cornfield meet.
The only other likely photos of RGS No. 36 are two of the four Jackson panoramas of the Ophir loop. Those two photos are attributed to be of No. 36 under steam, trailing smoke. The other two had "art work" images of a short train, without smoke.