Dell,
I'm in favor of opening the rules to use composite mains. Hallel has been using a composite main for 3 seasons in LMPHRF races.
As a side note, I don't think Dacron is inferior to composite. I use a composite sail because I got a really good deal on it. When I buy a new main, I may go back to Dacron.
Regards,
Bill
Hallel 88