Funnily enough, I've got an Enya 15-III 3303 engine, but I ended up putting a OS 15 LA in mine...

For the radio I also used the Hitec HS-81's but with a JR 610 receiver and a 600ma nimh pack (AAA)size.

I beefed up some the area around the engine and landing gear on mine and made the engine mount removable so it might be a bit heavier but it still only weighs 2lb 5oz. I had to add about 1 1/2 oz of weight in the nose for balance....