Although the jet .46 is a great engine, but is really made for a airframe designed for speed. It should fly it well if that is what you have to work with. However the Something Extra was not designed for speed as the wing is much to wide. It is my opinion it is one of the best aerobatic sport airplaned out there. If it were mine, I'd love to see a Irving .53 on it. I have a Saito .56 on mine and believe it to be a great match.