A completed track run!
Since taking this photo I took them downstairs and put a first coat of primer on them. I had only two pins slipping out, so the pressing in seems to work. (But I think I lost one of the pins).
These are fragile. I had to repair two of the links - the piece on the end of the track is very thin - nicely molded for scale I imagine but I might prefer robustness for these. I don’t think they are going to handle much handling.