I use a whisker biscuit rest and until now I have been using easton carbon storm arrows with 3 long plastic fletchings, shooting odd fletch up so that all three fletchings pass through the biscuit and don't go through the gap in the rest. I was recently told that the 4 fletch arrows were "designed to be used with a whisker biscuit". It seems odd to me, because with a 4 fletch one feather will pass through the rest untouched through the gap and the other 3 will have to pass through the fibers of the rest. I don't know if that is enough to change the flight of the arrow or not. Does anyone have any experience with this?