I have another sd70mac, so that one definitely, I am hoping that he will teach me how to do these. There are 6 of these engines, however one of them is painted in orange and black, so I would like to get at least 3-4. (He tells me that since they are a shortline I should get them all, maybe when I am older and have money) He is really great person to learn from. He has taught me pretty much everything I know about engines. I can even now keep my dirt-cheap life-likes running well now.