AWESOME head and even awesomer company. They honor their guarantee.
My son and I killed 17 deer with the Stinger last year. After the season, we boxed them up and sent them back at the request of the Magnus Company. They sent us 17 new heads, a couple hats and T shirts.
AWESOME head. Flies great.
My son shoots the buzzcut while I prefer the Stinger. Both 4 blade 100 grain. THe only complaint I have out of either head is that the buzzcut main blade tends to bend easier upon contact with bone. It still does a great job and both are SCARY sharp out of the package. But it really does not matter as the company replaces them free anyway.
I also have used Blazer vanes with great results but at the end of the day, we went with a 4 inch plastic vane for best arrow flight. These seem to do better for using over and over after swapping out a new head without re-fletching the arrow.
Oh yeah, save the original package to mail them back.