I would never use 5-minute epoxy, cure time is way too fast. Before you can spread the epoxy on the joiner, both wing halves, and begin sliding the halves together the epoxy is already beginning to set. You will NOT get the full bond strength. Please use 30-minute epoxy as you WILL NEED the set-up time that the epoxy gives, it will take more than five minutes to slide the wing halves together and get eveything aligned and clamped. Plus the longer curing time will allow the 30-minute epoxy to soak into the wood, giving it even more bond strength.