I think there is a misunderstanding of the production processes. I might be a bit outdated in my technology, but Plastic models require a machined metal mold and are vacuum-formed plastic sheet or molten injection. designed to produce "XXXX" number of moldings to keep costs profitably. It is 1960s technology. Certain "Die-Casts" use a Metal mold as well.

I love our scale, but it is unlikely more designs will be processed this way, especially off of older model designs. However, surviving molds can be re-utilized if in good shape.

A pantograph is a mechanical method of reducing (or enlarging) scales for a drawing or in sculpting or cutting tools.

Modern Metal and Resin cast models use a "Master" to produce a mold, often silicone, and molten metal or liquid resin is "infused" to produce "XX" of a same size model

3D models use computer programs where a reduction in scale can be programed in and individually (X)smaller scale models produced by building up of resin deposits.

Just as a quick overview of processes involved. Hope this helps the discussion.