Unless you fly at the Nats, weight won't keep you out of a contest.

By the time you feel ready to fly at the Nats, you willl probably have progressed to the point that you appreciate and demand a light airframe, so it won't be a factor.

BTW, what was young Joseph Szczur flying this year when he won in Advanced at the Nats? Wasn't it a Wind S 110 (or something similar) he has flown the past couple of seasons? No weight or cost problems there, eh??