Well Folks, I can now report that the Tichy nylon truck bearings (#3059) mounted in a 4 mm eyelet, is the answer for rollability. I used a link coupler truck which I drilled out for the eyelet, the eyelet needs to be reamed with a #43 drill so the Tichy bearing fits. All of this narrows the space between the sideframes so a SHS pointy axle wheelset fits perfectly. And it rolls like a SHS truck. Pointy axle wheelsets are still available from Am Models.
If you are interested in a slight improvement using SHS wheelsets without the bearing, 5 mm eyelets work.