O36 if I am correct, is 18 inch radius. In 2 rail we use radius, so I ma not 100 %. However, I have tested Kadee couplers body mounted on 40 ft (prototype lengths) on 24 inch radius curves. They worked fine in the sense that they did not derail the cars. they would not align for automatic coupling on curves that tight. Body mount Kadees do not align well on any kind of curve. The center spring keeps them centered on the car end, not the track center.
I agree that fast angle wheels should have not bearing.
On a separate note, body mount couplers tend to cause less derailments when pushing - assuming the curve is not so sharp as the coupler swing.
Coming up with some way to talgo mount the couplers would get them working on some curves.
On the other hand, you could just use a "pick" to uncouple manually anywhere. My standard "pick" is a long screwdriver with a blade around an 1/8 inch wide or a little smaller. Stick it in and twist.
