I also shoot FOB's! They are everything you read on Starrflight.com and then some!! You pick any broadhead you want to shoot and it will fly! They were designed to guide large fixed blade heads. Paul (the designer) is a rocket engineer, so I would put money down that he knows a little about fast flying objects!!

I have smashed broadheads between big rocks--taken off blades...and just about anything you could imagine to try and throw them off and they still hit the X!