Today I made a test panel with flax fabric and biaxial fiberglass. I was wondering when you have to clamp off the vacuum line after the panel is completed infused? I waited until I almost didn't saw air bubbles and I had at this time already a lot of epoxy in the catch pot. Can I wait to long before clamping of the vacuum line, so there is not enough epoxy any more in the fabric? Of course the infusion side was already clamped off. 
I know there can be a lot of moisture in flax fabric, so is it a good idea to put the fabric in a kind of oven, so it's completely dry before starting the infusion?