You could always cut 3 ofthem at say, 30.5" (maybe to weak at that length but, hey.....), fletch them, take them out and shoot a bit with them and see how they do. Maybe then take 3 more (or those same 3) and cut them (if it were the same 3 cut the fletch end)to 29.5", fletch them and shoot them for a while. You would have to fine tune the bow each time but that is part of the fun too LOL . This is the part I really love about bowhunting/archery. You can tinker, discover and keep learning about your equipment continuously.