I've shot 3d for 20 years and indoor for about 15 and consider myself to know alot about typical set up. But this new long distance 70 80 90 meter stuff is altogether different. I'm shooting a 54lb 28 3/8 draw Vantage elite c2's with 540 navigators with 100 grain points. I'm using a .10 "BEST" blade. Yesterday @ 70 meters I was consistently shooting 8 to 9 out of 10 arrows right in there solid. X's and ten's. I go out there today and RRRRRRRRRRR OMG my group was about 8" wide with good height. Should I be using a .08 blade? should I shave the sides down to get rid of any possibility of contact? This is my first time with navigators and I need some help.