Josh, I've found that coloring the edges w/a magic marker & then using a belt sander on em makes short work of the initial part of the sharpening process. BUT BE CAREFUL. Then I mount em on the arrows, spin check/test shoot em, then finish up w/more marker & a 12" mill bastard file. I can get em fairly sharp this way, just not quite as sharp as my 2 blades. I think it's due (at least in part) to the difference in the angle of the bevels between the two head types.