I only recognized that I didn't proceed this thread, and thought I should add the last state of things.
Still not finished - e.g. the track for the book car, that my good old friend Otter1 built for me, is missing completely - but at the moment I'm focused on my 1:13 modeling.
____________________ modelling in 1:22.5 on 32mm and 16.5mm track
Actual project: 7/8" scale on 45 mm track