[dvd3500]

Regarding scratchbuilding: with few exceptions most scratchbuilds are built to a particular set of rules and for a particular series

Those series also tend to have a set number of tracks and events.

Also as someone who has moved around the world a few times a lot of the recommendations are around what paint, glue, plastic etc to use and that can be a very local thing.

Still, there are likely a few very basic set of skills that could apply...