Thanks Walter, I may well end up going that way (your kits are well known as being excellent). I have the origional magazine article, stashed from when I was a kid, so I guess that's half the puzzle. When I did a search, I found a lot of conversation on which engines have been used, but nothing on a comparison of the actual construction from the American Modeler plans and the Jetco kit. I'm still hoping that someone has that information.