So I was trying to get my new 55/75 GT 400's that are cut 29" to fly out of my 47#@27 Bear Kodiak Hunter. I tried 200-300 heads and was getting decent but not perfect flight. In all honesty I couldn't tell much difference between 200, 225, 250, or the 300 heads. I remembered something that I was told several years ago about spinning the shaft to orient a hen feather horizontal to center the strike plate which places the cock feather almost vertical and the other hen lining up vertical to the shelf. That fixed my problem and the arrows fly perfect with the 200 grain head which is what I had calculated beforehand. I was just wondering if others have tried this.