2001 SAN Ballast System...Reversible ballast pump?

I have a question about the ballast system on a 2001 super air nautique. I am going to add and additional bag to the system (center ski locker) and was wondering if the ballast system utilized a reversible system or two different pumps. Also, if you have done this modification before; any tips would be appreciated.

Reversible...
http://www.wakeworld.com/Articles/Galleries/BallastSystem/Image16.asp

Two Pumps...
http://www.wakeworld.com/Articles/Galleries/BallastSystem/Image14.asp

Mine is a 2000 and it uses the two inline system. I just replaced one that went out, and it was a giant pain. I used a Simer pump and t'd off of the existing system when I added my center sack.

planetnautique.com is a very good resource too if you haven't already checked there. that year SAN uses the two pump system...probably worth doing a reversible for the ski locker and considering also t'ing off that to fill the T bow sack. my buddy took the opportunity of upgrading to a ski locker sack to also go reversible on his back bags too...gives you much more flexibility to adjust weight side to side...much better but a little slower....