o30f:
Believe it or not, the RMC staff (probably Bill Schopp) once got a brass 4-12-2 around 22"R curves. This freakish thing had the first, third, fourth, and sixth drivers’ flanges removed, and the wheels lifted just slightly, probably .001 or so, off the rail, the pilot truck lengthened, and some other modifications. It “worked, but looked rather foolish due to the overhang”. [:)]