Tailbeams are not neglected - they are not installed, because if they were, curves would have to be tripled in radius. Same with scale cylinder blocks and pilot trucks.
Ted - I have a soft spot for Mountains, but as you can see, there is little interest in these older 2-rail models. I do have a bunch of them - I will share photos and keep it brief. This one is scratchbuilt. It took three tries to get the boiler contour correct.