Many of the structures are indeed handmade. Mick Henning and I used cardboard tubes, 1/2" X 1/2" basswood lumber, 1/4" plywood, and gloss photographic paper to build the structures we could not find or afford in tinplate. Attaching the photographic paper that we printed on a laser computer printer was done with double-side tape. Our first attempts were on an HO layout Mick and I are building, which was quite successful. Mick enlarged the files, then printed the walls, windows, and sidings we needed to build our Standard Gauge buildings. We found using the 1/4" plywood as backer really stiffened the structure without getting the bends we got when just using the paper. It really is amazing how much the resulting structures look like tinplate. One problem we encountered is even slight exposure to any liquid is a disaster.