[cjwalas]

Unlike Kevin, I've had good experience with the drive units from the Rogers... but only when used individually for single driver locos. I've had several Rogers and most of them developed a bind between the drivers (maybe this is what caused the gear grinding in Kevin's?). I suspect you're really tempting fate to add a third driver with those units. If you really want a Prairie, the Bachmann ten-wheeler might be a better starting point. Just my opinion.
Chris