Stacking Ballast sacs?

[blaze5012]

I have a Supra 24SSV with the gravity games package so I have the 1950 lbs. But the sacs in the back only hold around 500 lbs when full. When surfing I normally dont have a ton of people in the boat so I would like a little bit more ballast. Does anyone know if I can stack a second fat sac ontop of the stock gravity ballast to give a little extra weight when surfing? Does anyone have a better idea?
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[87SunSportMikeyD]

Ya I do it sometimes. No big deal, they can handle it.

http://photos.wakeboarder.com/data/3486/medium/wDCP_6353.jpg

[KY Steve]

I have a Supra 24SSV with the gravity games package so I have the 1950 lbs. But the sacs in the back only hold around 500 lbs when full. When surfing I normally dont have a ton of people in the boat so I would like a little bit more ballast. Does anyone know if I can stack a second fat sac ontop of the stock gravity ballast to give a little extra weight when surfing? Does anyone have a better idea?

The problem I had when stacking is that it pushed water out the factory ballast through the plumbed pump-out pump. Replace the factory sacs with 750's, just do the surfing side if you want to save some money. I will still put a small 150lb sac on the 750 if there is only a few people in the boat but its not enough weight to push out any water from the built in sac.