I just can't imagine that 600-750lbs in each won't do the job. I fill my front ballast and left rear, leave the right empty. I fill another bag on the left at 350. So if mine are only 275, that's 625 on the left and 400 up front. My wife drives and my 2yr old and 4yr old spot lol. I can surf that wake all day long, it's waist high, pocket is relatively short but the wake is great shape and has plenty of power. It amazes me the amount of weight people put in their boats.