If your broadheads didn't come with a small o'ring, go down to the John Deere dealership, go to the Parts Counter and ask to see their o'ring box...Take your broadhead and pick out a small o'ring that will slide up and over the screw threads, so when you screw the broadhead in, the o'ring compresses and you can align with the feathers...

Although some think this procedure doesn't help, I still do it simply so I know when I slide my heads up into the quiver that the fletchings all line up...So you aren't cutting new slits in your quiver each time you insert an arrow...