He found 90 lb. spine arrows, as Ben Peason had a man sitting at the shaft doweling machine and spine testing machine, with each arrow shaft that spined out 90 lb. plus in spine, it was thrown in a seperate pile for the Howard Hill trip to Africa.But, with the six inch fletch you,re right, your arrows may fly a little slower. In doing this, one has to ask themselves which is more important,speed or accuracy. Accuracy is more important in my book. What good is a 300 ft. per second miss, speed isn't everything. Besides, I like to see my arrow in flight so I can follow its flight and know where I've hit an animal. Jerry Hill..........