Well i'll try to explain what happens to an arrow when its shot. All arrows when shot will go into what is called paradox! Paradox is easily explained as the bending moment of and arrow. ie...if you hold an arrow by each end and bend it...thats paradox so to speak. Release shooters arrows will paradox in a up and down motion versus a finger shooter will paradox from side to side. To help any arrow recover from paradox, a hard helical fletching to start the arrow spinning is the most effective means of bringing the arrow out of paradox. If you will check with Easton or any major arrow manufacturer, they will always tell you that a helical fletch will always give you the best arrow flight with BHd's or field tips. Lilhunter is absolutly correct with the bitz jig and a hard adjustment. Carbon arrows do however come out of paradox more easliy than aluminun or wood because of thier advanced design capabilities. However, keep in mind, that you arrows should be spined properly and that the same arrow that you may use for shooting field tips may change flight characteristics when you switch to a BHD. The reason for this is that you have lengthend your arrow(which changes the spine) changed the FOC as well as added planeing diveces (the blades) on the front of you arrow when you change to a BHD from a field tip. I hope this helps rather than confuses you my friend......Jaw