Larry, no rules when it comes to flething flu-flus! Cut them with scissors or a knife, or on turkey, goose wing feathers you can split the membrane from the end. Spiral wrap or full length, etc. Use your imagination. The idea is more resistance on the fletch end, to stable faster and shorten the flight. If you have short cut pieces from full lengths, just double or triple up in the fletching clamp and glue-on. Kids, flu- flus and ballons...whole lot of fun! I'm a big kid! Good shootin, Steve.