I use the Jojan and also fletch 1916's which is my wifes arrow size. I never had any troubles you just have to adjust the front vholder and the back index receiver to the proper position, its kind of tricky but it works. I loosen them both off then place my shaft in the jig and with both hands turn each alignment devise till the feather sits flat on the shaft. screw them down tight and mark it for the next time you use those shafts. The jojan is kind of lacking in the adjustment area but you can still get it to work, I use the helical for both right and left wings and can get them both to work just fine,, you'll get it!!