Interesting, Would you just remove the 2000 rule pump from the thru hull and add 3 800 tsunami pumps after the manifold? One question is that I know the tsunami pumps let water bleed past them- how would you stop that?
This could be very easy for someone who has the gravity 1 system to upgrade to a 3 bag ballast system. Include a wire harness and the new owner of my old boat would love to something like this.