Right helical, Left helical, Straight, Feathers, and Vanes. I have heard a left helical will loosen broadheads and field points. What is best? I am not a speed freak. I do like Feathers. Why don't any of the pro shops around me have a jig for a right helical? Everyone I have talked to says that they only use a Left Helical. What should I do? Should I change my preference?