Guys,
you could put on a Mini-IMAC contest and as the CD request a rules waiver to make the wing span 80" (or any other criteria you chose to establish). This is a very simple process, and the waiver would be aproved (I'd almost guarantee it). Just advertise that you are deviating from established rules so guys don't show up with their .40 size Great planes Extra only to be suprised that they will be flying against larger planes.

Additionally, if you would like to see the rules for Mini-iac changed on a permanent basis, all it would take is a well written rules proposal. Bottom line, if you can generate interest, there's nothing stopping you. I definitely believe it's worth putting together a contest to see if the interest is truly there. No doubt there are guys around who want to fly aerobatics with scale looking planes without breaking the bank.

Consider one other issue here. Let's say "Club IMAC" is formed (I also think this is well thought out Mark), and let's just assume, the wing span is set to 80" with a 1.8 displacement limit. We could build a Midwest Extra with a Moki 1.8 for let's say around $1000 total. This could be a competitive airplane. Now year two rolls around. Some guy really wants an advantage to "be competitive". So he builds an 80" plane out of composites, price go's up to $1500. Next year another guy invents a super charger for the 1.8, now we are aproaching $2000. Next servo's...... you get the idea. If you have true competition, it will eventually be expensive.

Personnaly, I'd love to see a "one design" competition. Everyone has to fly the same airframe and motor, similar to IROC. Now we can truly see who's the best! No sponsors, no $10K super wammerdine plane, just an even playing field. Can you see all the big names duking it out with a Hanger 9 Cap? Oh well, it's fun to dream.

Kev