FVM wheels do wonders for these cars. The body mount couplers and etched details really enhance the look. If you want to go crazy, you can add some additional weight on the body between the wheels and around the mini weights above the trucks. With these mods they can be run on the front end of trains, but you need PERFECT trackwork using ME C40, C55, Atlas C55 or hand laid rail. There is just too much slop in older C80 track products to keep these things on the rail.