Thinking about making the fittings, hinges, rolls and everything made me look for sources of allready available parts.
I came across a supplier for large garden railways:
http://www.knupfer-grossbahn.de/
The offer a wide variety of norm parts, especially very small screws. Finding these I decided to use real screws instead of fake ones. I also found appropriate rolls that can be used for the control lines. Some parts may be used for making hinges and connectors. The even have steel wire starting at 0.3mm. Mmmhhh, am I going to make functional controls. Yes it is a bit overdone….on the other hand worth a try 🙂