I never thought about making more, but guess I could. Do you model narrow gauge?
Earlier it took me about 3 hours to draw up another different gondola. Came home from work and it looked great. Stuck some trucks under it and man was it wide...
When drawing I made sure to narrow it 6", but I didn't realize it was standard gauge not 36"
So I just spent another hour narrowing it another 8". Here is the first wide one on the left.
It also shows another problem. How do you drill screw holes in something like a flatcar? The car on the right is getting a ballast load so I just put a stiffening block down the center and didn't worry about it. The one on the left I want to keep open so I made an opening just inside the sills to put two 1/16" tungsten rods. And the bolsters have holes through them for the truss rod ends.
Narrowed car in the cooker now.