No, I was just trying a make a point...even with heavy balsa the thicker skins add less than 3 ounces total. Most contest balsa I've bought has been in the 5.5lb range and "regular" balsa typically around 8lb, but I used 10lbs just to demonstrate a worst case scenario.

I too use Probond and 7mil undirection carbon laminate on my foam wings but I do a lot of sanding to get a good finish, so I'll take the extra wood and sacrifice a couple of extra ounces worth of contest balsa to be safe.

When I use 1/16th, I get paranoid about how much sanding I'm doing and end up with an imperfect finish. Next time I do 1/16th (probably on a Boxer I'm planning to build soon), I'll try putting a coat of sanding sealer on before I start sanding so I won't have to remove as much wood to get the desired finish...