Mixing at least 2 oz doesn't make much sense to me and the directions on the can seem a bit vague too , the thinner the part the more catalyst it takes . I mixed 1/2 oz with 8 drops of catalyst and the lenses seemed to cure but stayed flexible , so I did it a second time with 10 drops to 1/2 oz of resin and it did the trick . . . but it did take several hours for them to harden . Next time I'll probably try 12 drops of catalyst . I was going to ask you how you poured the resin into such a small part , never thought about using a syringe .