arkansas.....as far as placing my cock feather, I do the "bearing test". Simply take 3 bearings (old skateboard bearings work good), put one on each end and one in the middle of your arrow. Support the two end bearings across an inside corner of a counter top. Push down on the center bearing. The arrow will spin in the bearings to the weak spine of the arrow. I usually do it a couple of times to make sure (some of the carbons have 2 spots, I go with the stronger one). I then mark the top of the arrow, and put my cock feather there. I shoot a Bodoodle so my cock feather is down. Since doing this I have never had to "index" my nocks. If one of my arrows won't group after this, it only gets worse by twisting the nock. I heard this works with finger shooters too but don't know any (the cock would have to be on the side).