Quote Originally Posted by Hutch~n~Son Archery View Post
copterdoc Explain!

Here is a video showing 3rd axis shift. http://www.youtube.com/watch?v=mXI29xQtqwc

Start at 49 sec in.

3rd axis shift, is lateral nock travel. You are pulling the bow by the string. When the string moves to the side, the riser twists and follows the string.