Nah. If it's something scale sized, lettered for the Santa Fe or Southern Pacific, and fits in the 1948-1951 timeframe I'll buy it. I have DCS and TMCC so it doesn't matter to me what control system the locomotive uses. All my steam locomotives are MTH Premier and DCS. Diesels are Lionel (except one MTH that was converted) and TMCC. It just so happens the models I wanted were manufactured that way.