When I first was back into bowhunting, I had PROBLEMS getting thunderheads to fly right. I called Gary, the owner of Slick Trick, and he just sent me a pack of heads with a note that read,"try these. If they work, send money. If they don't send 'em back, and I'll refund your postage." Best offer I ever got on bowhunting stuff(or anything). In the end I trailed one deer a total of 20 FEET with two pools of blood in the 20 ft "trail." It looked like someone had ladled the blood out in two perfect pools. Unbelievable. And yes, they fly like they say. In all fairness, I have gone to mechanicals only because of personal preference. You will do VERY well to order the tricks.