I'll send the rest of the cars I modeled in a little while (I'm on dial-up too, so it takes a while.)

As I mentioned, these are copies of my N-gauge set, so a lot of the accuracy is what the manufacturer (Backman) gave the actual cars.  To save costs, they made all the couplers the same (and probably a lot of other parts too.)

I have a locomotive too, but it's on my desktop computer, so I'll have to send it tomorrow.