After studying the 1800's Romania, I have come to believe my layout will be primarily small radius curves with little switching to 2-3 industries and by a village. My question , well......two questions actually, are: 1. What is the minimum radius I should run the Athearn Old Time 2-8-0 with the Old Time Overton Passenger set? 2. Are these a good choice? The wheels come plastic and I would be changing over to metal.