12th scale is almost hit or miss. if your car is set up properly it is the easiest thing to drive. The key is getting it set up properly, which is just a matter of being very detailed when you build it. Don't say, "oh that diff is good enough, its just a little gritty" since it will make a difference on the track. however 12th scale (when properly set up) is MUCH easier to drive than a sedan, it goes exactly where you want it to, there isnt any real weigh transpher like there is in sedan so you dont have to worry about setting up and commiting as much.

Jimmy-Business cards or i was suggested to use the header cards on parts bags (the little cardboard thing that tells you what the part is), and i think the header cards are thinner, so a header vs. business card is properly just and adjustment (how much camber you want), not a right wrong thing.