anyone know of any bottom or side filling ballast bags.. maybe one outlet on the bottom side to drain and another on the top to fill/.. 5,6, or 7 hundred lbs.
I have a center sack that came out of SteveMIA's boat that is set up like that. It was the original MLS sack that came from Malilbu. Maybe you can find what your looking for if you try a Malibu dealer near you.