Auther got it right . I guess Im one of the "noones" and Im damed happy about it to . I switch from 3 4" feathers to 3 5" feathers last year and my fixed broadhead flight has realy improved . A guy that works in a "pro" shop should be trying to sell the things that will improve your archery experiance not make it more dificult , Like Auther said he probably has a bunch of 4" hes trying to get rid of .