I believe that boat has 3000lbs ballast standard. You need more weight. Look around and there are tons of threads talking about dialing in wave and the common denominator is to add more ballast. Guys here have at least 4k# of ballast. Your boat has plenty of freeboard and can handle lots more weight. That's what it all boils down to. I would suggest distribute weight evenly and displace as much water as you can get away with and then use your surf tabs , wakeplate and speed to shape the wave. That way it all looks clean and you do not have a ton of tubes and pumps and bags lying around and tripping over. I agree external bags are effective and work well, I just like clean organized look. Plus, if you use your tabs then you can switch goofy to regular seemelessly without having to move bags around. I am able to switch port to goofy side quickly and make transfer (while holding rope) and its fun to try different sides. You cant do that if you have a one sided list. Consider upgrading your rears to 1100lbs in addition to adding lead for a total of minimum 4k#.