DOPVFT, if you want to eek out a little more speed, feathers might help out and bring your FOC a little more foward also. I shot the NWTC a couple of years ago in the HC. I was convinced that the greater speeds would help me out. I spent ALOT of time at the range trying to figure out the fastest, quickest setup thinking that would help out, and as stated above by someone else, I was very surprised that there was not much difference within 35 yards. The lighter arrows changed my point of impact higher on the target, these results got me real excited. But when I changed the gang adjustment so 20 would be on, all my pins were already correct. Conclusion, I had reached a point of diminishing returns, meaning that I now had a more critical to shoot bow with the same pin gaps, go figure. I have shot open class with bows in excess 300 fps, but have shot my best scores and won more tournaments with bows shooting in the 280 fps. Again, I feel that there is diminishing returns in most cases. Just remember, take the gimme's and hold your own on the long and good luck.......