I also agree about the trucks, and that was my point about redesigning them to make it easier to swap scale wheelsets for the original high-rail wheelsets, or vice versa for the original cylindrical hoppers (as long as the wheels are in the correct gauge for both scale and high-rail.) It could be done with a little ingenuity and still retain the rotating caps.
I have four cylindrical hoppers: three converted with AM trucks and one converted with MTH trucks. One set of the original cylindrical hopper trucks went onto a Lionel auto-rack car to determine what the newly introduced American Flyer auto-rack would look like. I hated to discard a beautiful set of trucks entirely.