Nick, we found foam on the inside of the ferrule only. I think it's there to supress the sound.iusedtoberich said:I cut a predator in half lengthwise several years ago (don't ask) and I recall there was some blue foam right behind the cap of the ferrule. It was the diameter of the opening and only about 1/4 inch long. I suspect it was there to prevent the glue from the ferrule from running into the hollow area.
Is this what you found also? I can't tell from your picture.
Thanks