mwpowell
Contributor
I'm not familiar with your BC, but you have the right idea in moving your center of mass toward your butt. You might think that the weight of the tank is negligible, but keep in mind that the tank neck, valve, and reg are all located near your head and provide a lever force that pushes your head down. So, try a combination of weight belt and moving the tank down a bit, and see if that works for you. Also, >30lbs sounds like a lot to me even for cold water/Al tank. Make sure that you are not overweighted. Perhaps you could shed some lead.
Mike
Mike