I noticed the same thing. Not just with modern O72 switches, but with prewar 711 O72 switches, as well. My guess was that O-gauge track was higher in prewar days and the height of switches never changed. I, too, would appreciate more information.
I haven't found any solution except to shim the track near the switch. Takes about 1/16 inch.
JK
Our community is FREE to join. To participate you must either login or register for an account.
Get the Classic Toy Trains newsletter delivered to your inbox twice a month