What about limiting the first, say, two classes in IMAC to a certain size? Something like 62cc engine or less. That way beginners are encouraged to bring out what they have, and give it a shot, rather than compete against very large aircraft from the beginning. Yes, people are flying 35% aircraft in Sportsman and while smaller aircraft are definitely capable of the maneuvers, it is discouraging when you have to compete against a 'trophy collector'. Something to even the playing field at least in the lower levels would encourage more participants.