The work is awesome. I just got. my 80s Train up and running again with my son. He really is into LEGO. As he wanted a crane to lift up the goods onto a truck I stumbled upon your great work.
i tried to reverse engineer it using the stud.io Design software. It worked quite well and I have finished all ground work and the structure but I have no clue how you managed to build the crane part.
here’s how far I got. If anybody want’s to jump on I’d be happy to share the stud.io file.