How to do you resharpen Muzzy Blades? What tool do you use? The reason I want 6 is so I can shoot two groups of 3 and see how they group to compare. I have already shot a Muzzy practice blade I have and it went right with my field tips at 30 yards and Blazer vanes but I want to be more scientific than that and just see if I want to stick with Blazers or switch over to feathers like my local shop swears by.