Hello, I’m just new to the forum. I have a 2014 SC450. This was my second summer with the boat so I have a pretty good idea of the surf wave. Did you end up with a nice wave? I found with the factory hard tanks full, front bow sack full, upgraded rear sacks to Enzo style 850lbs per side and had them 100/80 surf side non surf side. Anywhere from 10.6-11.8 made a nice wave. Had to use the trim tab to get the boat on plane depending on how many people I had in the boat. The factory surf tab settings were all wrong too. There is a chart out there that Supra gave to their dealers to adjust when demoing the boat back in 2014. I have it but not with me now. The barrel wave is no good no matter what you do. You’ll need to upgrade that prop to a 15x12 for sure even if you are at sea level. I have a 15x13 on my SC450 and it sometimes struggles with the weight. I’m at 3000 feet though.