RE: Spine /Center shot
Fletchead:
It varies with riser design and the type of material that is used. You saw me mention the ' Tec' riser being better at controlling this problem. The reason is quite obvious in that the rod length is supported in two places and the distance from the ' Tec' end to the end of the cable guard is subsequently much shorter.
The material composition is a key factor. For instance, if an aluminum rod is used, what grade of aluminum did the manufacturer select? I did have a major problem with a customers bow and proceeded to remove the carbon rod and replace it with a steel rod. The problem was eliminated.