Being in over my head in too much RR at too late in life I sometimes just cut prototypical corners. OK frequently. Oh well, all the time.
After installing most of the track I wound up needing 90 bumpers to protect the concrete floor from taking multiple nicks and scratches.
90 of anything can get expensive or time consuming so using 1" lengths of Toyota vacuum hose and a box of 1 5/8" 7 penny square drive trim screws and installing them just inside the rails high enough to grab the axles, it works as needed.