Chugging along, decided to put up shelving to display rolling stock when not in use, at this time, more than half finished with that. Most of the structure has been fairly easy to put up, basic math and measurements......I'm not sure about that algebra thing.
Besides securing the track with a good level fit, with the corners canted inward, I think my biggest challenge will be a thin cable and support poles securing all the way around, inner and outer, to curtail any derailments that may fall onto vehicles. Oh no, can't have that happen.