The Grunt gun has been developed over 10 years with a lot of hard chargers. The basics we have worked on over the years are: 1) ease of getting into a big one. 2) Hold and drive, especially off the bottom. 3) Refinement of volumes both in profile and rail shape. 4) The outline for control in big surf. I think we have nailed it in the Grunt and Grunt XL models. Remember, this is a very serious board for experienced surfers only.