Bare shaft tuning will usually identify if your arrows have the correct spine for your setup. I suggest you download Easton's Tuning Guide and read it thoroughly if you haven't done so already. You can download it from this link: http://www.eastonarchery.com/downloa...ning_guide.zip. Usually a good sign right away is your arrows fishtailing and not grouping well. Try shooting some field tips then shoot some with broadheads (be sure your broadheads are spin tested not to wobble). You eventually want the field tips and broadheads to group together when you get down to your final tuning. They may shoot left or right of your field tips and that is ok for now as long as they have tight groups. You can bring them together by moving your rest or nock point depending on where they hit. When checking spine you are looking for tight groups with NO fliers or wide erratic groups. If they fishtail that will be a dead giveaway about spine issues. Sometimes it is hard to distinguish between spine issues and a bad out of tune bow, hence the bare shaft test. Good luck and let us know how it goes.