I think a short, wide, flat box, (about 2-3 ft) would be better for a beginner. It leaves more room for error, and you could build a little incline at the front to help you up. And once you get it down, you could do a lot of tricks on it, and it should be all around easier. But i've only every hit sliders in a cable, boat could be different. On the flip side, i think a rail would make you a "better" rider, because you will have to be more accurate.
|