great wheels, but...
The On30 wheel sets are high quality parts with superior manufacturing. The main problem is the points axle ends that are too wide to fit the truck side frames currently in production. I find i have to grind the point/taper from the axle ends to make them fit into the trucks. Secondly, the two arms that support the brake beam on the trucks has to be thinned several thousanths of an inch to allow the wheel sets to spin freely in the truck assemblies. Overall, I rate these wheel sets at four stars only because of the adjustments required to make them free rolling in the truck assemblies.