Improve ballast pumping system

[you da man]

Thank for the idea of adding a pump that will transfer the water from one sac to the other. I will not help for the filling of the 1st sac but then for changing side it will be efficient: with 2 pumps on each sac, one will drain faster and the other will obviously fill faster.
The reversible pump feels like a natural choice: ony one pump to operate and you can also use it while riding to adjust the wake when necessary.

Do you know where I can find a switch "moomba style" to operate the pump?

I actually use the Tsunami 1200 to fill my 1180 center sac if needed. There have been a time or two when I did not fill my 1180 center sac at the boat ramp when off loading from the trailer and/or while enroute to my favorite spot. When this has happened I just turn on the center fill pump and lift up the triangle cushion in the bow to access the vent plug for the 1180. I then attach the Tsunami 1200 to assist the factory pump and it's filled in just a handful of minutes. I don't know what you mean by saying the Tsunami pump will not help you fill up the 1st sac? It will fill any sac if you have the right fitting. You can use it to fill one side first thing when you get to your favorite spot and then when you're ready to transfer the water to the other side you can use the same pump to do that.