Multi engine plane rules are different, Peter - engine damage must be announced, this is probably because you can take 1 or 2 damage per hit. p27-28...
Hahahaha nice one Peter. I can see this one being a lot of fun if perhaps somewhat tricky. A game of hide and seek perhaps? A nice load of ace skills...
Why did I bother making all those metal models all those years ago Dave? They were really unbalanced, and not a patch on your model or the paint job....