I was wondering how the nytros are holding up? I had heard that they had some bulk head or tunnel problems(weak)bending. Have never ridden one only sat on one and the running boards seamed to flex a little much. Also how do they ride, carve, handle? Is the stock performance O.K. poweer wise? Or do you have to dump a good chunk of money into it to get it to perform? I know reliabilty is good.