I have a Barnett crossbow that doesn't shoot at all well.The rear end of the bolt kick out sideways when you shoot and it doesn't group well.It has a cheap rest that is factory installed which is two thick wires that the bolt rests on.These wires can be bent to position the bolt better but try as I might I haven't been able to position the rests such that the bolt doesn't kick out sideways.I imagine that the crossbow is harder to tune than a compound bow due to the strength of the draw and the shortness of the bolt.Any help is greatly appreciated.