I have just recently moved to the blazer vanes myself, I have access to two sets of 6 jigs. We can fletch right helical, offset, straight or what ever you want. If you use blazer vanes in a Jo Jan, I suggest putting one where you need the actual vane to hit the shaft, and the other a little higher in the clamp.( only put glue on the one that you want to be set in place, the other is just there to support the clamp and not raise the back end of the blazer with glue) The clamp itself is a little long and it will raise up in the back because there is less surface area of the blazer touching the shaft. The clamp will be a little heavy in the front and raise the rear. My suggestion, is for blazer vanes, to buy a jig that is made for blazers. They have them at Bass Pro. Sorry, I know some of you dont like BP. But you can also use cabelas if you prefer. But you cant go wrong with a Jo Jan. That way you can also fletch long vanes also, you wont just limit yourself to blazers. Very simple process actually, and if you shoot the biscuit put a little dab of glue on the front of the vane to help it hold up when it goes through the whiskers.