My buddy had a Supra Comp and no matter how much he weighted it the wake did not get much bigger then you have it pictured. Those boats are pretty flat bottoms and they are really meant for skiing. He actually like my old I/O wake a lot better and it got a lot bigger with some sacs. I am sorry to be a hater but I didn't want you to throw a ton of money into that boating weighting it down. It was a fun shape though and I liked to ride behind the Comp the few times that I went out on the Supra.
It does get bigger than that because we have had six people in it before and it was bigger. We'll probably get side sacks somewhere down the road but for now were not all that good so i don't think it matters.