Every picture I've seen of Akron Machine shows a structure that is on the roof. I am building the HO version. The two pieces with the windows are one inch short of the length of the building side walls so I have no idea on how to complete the building. I do not like the rounded roof option. Does anyone have any suggestions. Since I printed the entire model I didn't bother to measure every piece before I started.
I had what I think was a similar issue. I made filler pieces from brick (not a realistic structural solution). Could also make filler from the same window material, which would be more correct.
Same situation on my N scale version - I made small filler pieces from the brick walls and glued everything to a heavier backing piece which was the correct length to fit between the end walls.