Brian, I would think just the opposite. For the tiny amount of weight it will add, a counterbalance cross-brace will add alot of strength. Don't get me wrong here, weigh is important, and I build my planes to fly light rather that to survive crashes. But with that said, an extra foot of square balsa stock (that wieghs practially nothing), strategically placed, can provide a great deal of support - especially when you plan on wringing this baby out.

I build the Ohio Models Edge (sorry Jeff and I actually added some additional support in a few strategic areas - it still came out very light and is very agile.

Believe me, these designers know what they're doing.

Best of luck and I hope to see you around soon!