Not many collectors can say that they have run a Quaker! The only other who I knew had one was Dave Ely. Dave was local to me at the time (Chicago area), so his was the only Quaker loco I have seen, don't remember if he had a 728 or 732. Could you post pictures of yours?
I have collected scale-series trains since the 1970's, but never had a T-rail layout until recently. Last night was the first time that I ever placed a 700E, tender and the 4 cars on the track and ran set # 707W. I chose a 700K to pull the set, was surprised that it ran, did 2 loops then the pilot grounded-out, tripped the E-unit and I ended the experiment. It was still satisfying to accomplish this, and can't understand why it took me so long to do so.
A close friend, John Potter, who recently passed away, told me that he ran everything he had. I am trying to live-up to that idea, as that is what these trains we collect were made for.