Earlwb, you are the man! Anyone who can get a couple of .020s running at the same time has my respect!
Just by adding the engine pods, you have a good twin trainer without having to buy another plane. If you put a couple of .25 two strokes on a .40 size trainer, you are gonna have some fun! Since you already have a nose mount, etc, adding a third motor is a piece of cake too.