I have a 6 pack of Tusker Delta broadheads that ive been meaning to try out! My main issue is the sharpening of them. I have seen the demo of john sharpening them on their website, i was wondering about what file to put on that sharpening board! What would a "coarse" file be? Would it be a double cut bastard file, or just a single cut, or maybe a rasp? I normally use nicholson files, and have had good luck with them! I guess the only other questions would be to those who use them, how do you like them, any tips on sharpening them you could offer perhaps? They look about as tough as a broadhead can, thinking they may be goin bear hunting with me this fall!!!