I recently made a test lamination with 5.9 oz carbon and an end grain balsa core. It was .165" thick and a 6" x 6" square weighed 22 grams. I cut the end grain balsa with a bandsaw from a block of balsa. The laminate was vacuum bagged using West Systems epoxy. The result was much stronger that 1/8" aircraft ply. Depending on your budget, you might consider some 2.1 oz spread tow cloth from CST Sales. It would be a lot stronger than veil.
Scott