In my Barnett booklet that came with the xbow it reccomended 3 blade broadheads and that you should use rubber o ring to "adjust" your broadhead so one blade hangs down to match your feather or vane that hangs down. Well I priced o rings and went into sticker shock as any I found were 50 cents or more and finding the right size did not work either. ( at the hardware store some may reccomend the auto parts store but they are even more expensive there) ( Some of you guys may think what the heck so you gotta pay 10 bucks for a buch of O rings well being on a limited income I have to make do with what I can afford.) Also Dang Gas prices is killing me this year on going hunting any distance. So what to do? Well I thought maybe a rubber washer would work so I checked them out. Yea haw found some that fit on the broadhead shaft with no slop and while they were a bit more in diameter then the arrow/bolt shafts not enough to matter. at 11 cents in price they were at least for me affordable also. So now all my broadheads are aligned the same and yea it does make a difference! Just thought I would pass on this tip for those who may not do it or never heard of it. Jim