Hmm, was just wondering if you have seen a 4* fly?!? The one you have on your list is the 40 size. I flew one with an 46FX on it and it was very fast. Unles you are looking for serious speed and think you can handle it, I would rethink putting a 60 on that plane! Also I use 10 oz. fuel tanks for my 46 engines. With a 60 on the front from my experience, you are going to have fairly short flights with just a 10 oz. fuel tank. I don't see the advantage of going with a 60. The plane is small and light, you could end up ripping the wings off. [X(]