Just interested who came up w/ foam core in limbs. I got a bow made back in 1999 and the bowyer told me he put a special core in the limbs for me, when asked what it was he said it was foam and asked for specific he wouldn't go into it and just told me that I would like it. Got the bow and I was very surprise by the performance and quietness, still have the bow. I shot other bows w/ foam and carbon and wasn't that impressed w/ several of them. So, what is the difference in foam and the configuration of it in the limbs? Do not want to step on anyone's trade secrets. Infact, my hunting bow is back to red elm 46# that cast an arrow about as good as any.