This is a short video of how durable FOB's are. It also shows that you do not have to change your sights to shoot FOB's. You do have to make sure you shoot a good fall away rest and that you have 100% clearance. This is achieved pretty easily and once done you can shoot FOB's along side your other vanes and reap the benefits on a windy day or on a long shot without changing your entire setup. For more information on FOB's, visit www.starrflight.com