RE: good .40 size arf
Another vote for the Skyraider Mach II. I had an Evolution .40 in mine and it was good enough - fast, very maneuverable. It's built light and is a fun flier. At 70 bucks, it's hard to go wrong.
Another candidate if you don't mind doubling the price is the Sig Four Star 40.
Either one is a solid choice.
BobbyG