Thanks Guys, I will grab some of all sizes that are close to what the chart says and go from there. I am a tree stand hunter and am more concerned with the quietest and best set up that I can get, as opposed to speed. I expect to lose some fps with this change, and I am fine with that. I read in an article the other day that Jim Dougherty and the president of Easton, I believe his name was Greg Easton, both shot the XX78 for all of their hunting. I am also ready to go back to feathers after a one year switch to vanes. I have a lot of shooting and tinkering to do with all of these changes, but that' s a fun part of the game.