We probably do a lot of the same things ahead of time to minimize "open time" during layup. The reason I was feeling some pressure was that my layup was a 34 foot tiamaran half hull. There were 4 layers of reinforcement - Kevlar, carbon fabric, carbon uni, and glass. That's about 6X the size of A-class. I used a Polyamide curing agent with a 90 minute pot life at 65 deg F. But I was usually working in 80 to 90 deg F. The part took about 6 liters of resin so I would measure out shead of time three batches of epoxy/hardner and mix them as needed. Once the epoxy is out of the pot an into the fabric it takes a lot longer to begin cure. Do you have any time saving ideas to help Mike with his 20 foot trimaran layup?