Shawn, in your case 12 hours under vacuum is plenty. I keep mine in the bag for 24 hours, but it is a matter of convenience. You bag on a sheet of marble, I use a sheet of glass. After 12 hours the resin has past initial cure. While still soft, it is well past the gell state where the vacuum will debulk the matrix by removing excess resin. All you have to do is put enough weight on the top of the stack to keep it flat on the table while the resin continues to cure.

Since I know you already know this, it is more for the sake of readers just getting into sheeting wings. Keep up the good work.

Scott