Hello, my chris king has been steadily skipping since I got it. more and more. Its been cleaned out with gt85 as recommended so it can move more freely for trials use. When it skipps it makes similar noises as to when it is freewheeling. The possibility is that the force I use to pedalhop and such, causes the back wheel to spin, hence the teeth not gripping the frame properly. I noticed some faily deep marks in the space the teeth grip to my droupouts. As tarty is closed I cant send it to them and even so the whole bike would need to go, to find out whether this is the problem, which it may not be as the noises it makes when it skipps dont so much sound like the wheel slipping in the frame. If it is how would i solve it?