RE: categories vs money
You need a couple more award categories, there Balsaovercast unit! Would you have plaques for each award module?
I read somewhere, Hobbico is repackaging the Twinstar for next year. Something to keep an eye out for your raffle plane needs. But, I wouldn't recommend keeping your eye out for too long. At some point it will hurt, and that would not be fun. You want this to be fun right?