Ski Nautique 2001 hull ballast?

Hey guys,

I have a 1982 Ski Nautique (2001 hull), and I own 3 fat sacs. I usually run with 2 filled about 2/3rds full - one on either side of the engine housing (just leave the 3rd one at home). I'm thinking about hooking up a semi-auto ballast system, though, and I'd like to know how much ballast others use, and where they put it so I can set my system up properly. I know it's preference, but I haven't tried many other configurations, and am just looking for some opinions.

Thanks!
J