Wow, bittersweet as they say. Good for you guys to keep at least aspects of Marty's South Manchester layout going. This was a historic layout for the 3-rail world.
It is such a shame that great layouts are not preserved by family or new owners. I love the idea of re-using or recycling former layout materials. After Marty passed away, I began studying videos of his catenary system, and it motivated me to plan for one on my layout. It took me a while but I finally tracked down enough poles and wires to build it. It'll likely be a couple more years before I can make a dedication run.