ballast system design and build

I have a 03 Centurion elite v air warrior when we wakeboard we use a bow sac under the bow seats a 400# sac each side of engine and factory center tank, 250#s I think.When surfing we use a 750# port side of engine 400# under passenger seat center tank,bow sac and people.I'm sick of throwing the pump overboard and asking people to move all the time so I'd like install a fully automatic system but need help with design. I think i want to put a 400# starboard side of engine,750# port side engine for more surf weight,400# under passenger seat for surfing and the bow sac.So im wondering if i can link the bow sac and factory center tank together and put other 3 sacs on there own switches? What kind of pumps would be best? I kinda like the factory set up where the water drains out the side when full. Where to put manifold and get water, theres a 1" drain hole under back center seat that looks good if big enough? Where to put check and solenoid valves? Do i need vents? Easy operation is my main concern. Any help and advice would be great thanks.