For years I have hunted with aluminium arrows and been very happy. For this upcoming 3-D season though my friend conviced me to try carbons for speed puposes. I fletched and shot it through the chrony, I went from 249fps to 269fps. My question: Is a Goldtip 5575 a good spine for me? I'm pulling 70lbs with 65% letoff. Have a 27 inch draw. I finished the arrow with 4" feathers and a 70 grain tip. I also might try this set up with a heavier tip for hunting if the bow doesn't get to chatty. I would appreciate any feedback.