I have a Zodiac C310S. This weekend at the lake, the floor was (for a lack of a better way of explaining) "breathing". When going at any significant speed, the floor would raise up and then go way down. It almost felt like air was rolling up and down the keel. I checked the pressure and it was at 3 psi as recommended. I got the boat out of the water and deflated then re-inflated. Still doing it. Has anyone experienced this before? Thanks for any suggestions. -Brian
