I was able to pick a Liquid Force Witness wakeboard at a very good price. I bought it for my son who is a beginner right now but progressing rapidly. It has a three stage hybrid rocker, winged shaped rail, double concave v tail, and warped long based side fins. I don't know what any of that means. He has a beginner board right now and will need a different board soon but how difficult will this board be for him to ride?