The foam is hard to get the same results with each lure, that's why I use the white resin with micro balloons and I get within 1 gram of the wood lure that I copied each time I pour, but your measurements must be right on, with just enough resin to come to top with out wasting it. That will take a little experimenting. In my case it was about 40 grams of resin and the same of the hardener with 15 grams of micro balloons, it took awhile, about 4 times to get it right but when I got it goes 1 2 3.
Wayne