all of my 3rail steam received scale NWSL .145 engine truck and trailing trucks wheels of appropriate size. Do that and the drivers will no longer be noticeable, especially if you blacken the rims. The .145 NWSL wheels will track through most 3 rail turnouts with a true T rail cross section. You may have to modify the points on some turnouts .
Notice these Hudsons engine truck wheels roaring a long on 3 rail.
Here are pictures of other locos with scale engine truck wheels . You will need a wheel puller from NWSL and perhaps a cheap arbor press.
