Good effort guys. My suggestion is that you stay away from building skinnies that are in the 3' range high. That is where if people come off, the front wheel tucks under and there is not enough time to get the hands of the handle bars and in front to break the fall - potential for neck injuries. Build skinnies 2' and under or 5' or higher and bit wider. That way if someone is going to come off at that hight it gives them a chance to manual or wheelie off, or at least get their hand out to protect themselfs. On skinnies at 2' or lower the front wheel will not tuck under and the chance is that the rider will just poggo off and not even go over the bars. Good luck!