Don't know if you got this fixed or not? But I am with bear on this. I would drill a small hole say .015" in the feet. It will flow much better. just make sure to face the holes in a safe direction the first time to see how it vents. And you will have to poke the plastic out cause it will break off sometimes. I made a swim bait mold that had tail fill problems, and I drilled the tail. Worked perfect!