you wont hear much good on hear from guys (most whom have never shot any) about mechanicals but the truth is good mechanicals are great heads to use. as far as the ones your talking about i dont like the blades they look like theyd snag going in cause of the little end built in to hold the rubber band. try some rocket steelheads or sidewinders, also spitfires from NAP are good and ive heard alot of good things about rockymt snipers but have no personal experience with the rockys.