ok good thanks! now I have a very dumb question.....all the pics I have seen look like the entryholes are horizontal and not vertical...I thought that was weird being that arrows should have spin on them and i thought I would see all kinds of different entry hole variations side ways, long ways, diagnal..etc, or am I wrong...do you need to have them screwed in a certain way?? or just screw em in andlet it rip??Im completely an idiot about mech heads...sorry for being annoying