Robbie Racer,
You have some serious HP. 1160HP and a light lay-up. That is some power to weight ratio.
I am not that familiar with the Carrera Cat. First, I am not buying the "sideways rocking". My best guess is the problem is somewhere in your outdrive. I don't think it is the prop and I don't think it is your boat. Here are your options as I see it.
Try tunnel tabs. The tunnel tabs will not fix the problem but it may offset it so the boat doesn't bounce.
Try a nose cone on your Bmax.
Try an IMCO SC drive with nose cone. Select the correct length lower unit so your x-dim is located in a "proven" position.
I recal a recent post in here about changing a Bmax to the IMCO SC drive and the IMCO drive picked up about 8 MPH and the slip factor went way down.
Good luck. Feel free to contact me if you want to discuss in more detail.
PS When your boat is dialed in it should run in the low 130's.