I saw some pretty slick MTH cars today at a club meeting, and I'm thinking about getting them. However, I've never had MTH stuff before (I only run USA and Aristo) and I curious as to the difficulty in putting USA couplers on these cars. Can this be done? If anyone has experience with this modification, please let me know. (Before anyone recommends it, I don't want to use Kadee couplers on my rolling stock).