Okay, I got the SD40 shell, and there is no way it is going to fit on an SD40-2 frame. Sounds like a perfect excuse for buying another locomotive! I just ordered the cheapest Kato SD40 I could find, a CP Rail with the right color sideframes for the Conrail shell. When it gets here, I'll swap the shells and eBay the CP Rail shell, hopefully for the price I paid for the Conrail shell. Ah, the best laid plans...