Some years ago I saw in Fine Scale Modeller magazine Combat Models, an USA Vacuform small company who produced the LCI(L) in 1/72nd scale. The kits were quite nice but details and many parts had to be build by hand. Later I saw in the same magazine a fellow company who produced all the missing parts, both metal and photo-etched, for the same vacuum kits.
The problem was the price of these metal and photo-etched parts that would double the price of the vacuum kits themselves.
I opted for the cheapest solution and made those parts in Evergreen plastic.
String and nails were used all over, as well Evergreen doors, steps, windows, tubing, etc.
The green explosions at the back are in reality my mother´s plants...