So I have an old IS skim board that I got years ago and I never use. Well I wanted to make a skinny chick newbie board of out it so I bought some fin boxes and started cutting! The results are amazing. The thing rocks! I copied the angles and placement from my shred stixx board. The boxes cost me like 7 bucks a piece. The 110 pound chicks we ride with also loved it and they could get up on it easily.
Here is a link to me riding it. My airs aren't as big but you can really throw the thing around. Pretty funny it works! The board pearls hard, but I would guess that's because I am huge for it!