I found that I love to surf this summer and I want to upgrade the rear bags in my 04 LSV. So what size and brand is recommended? I have heard good things about the 1100lbs and the 750lbs sacs. I know the 1100 might push the wall between the locker and engine bay but could I prevent this easily? I want a great big pocket so should I get a bow sac also? If I do how do I fill it? Right now I have the Gravity III system. Could I somehow tie it in to the center sac? Thanks