I have a Bitz jig, have fletched 1000's arrows on them, and they are the best out there. Buy the extra clamps and you are set for anything you want to do. I've done everything from the biggest aluminums (2514s) to the small carbons (my FMJs) and have had no trouble with any of them. All metal construction so nothing to break or wear out. Also, any plastic jig is going to have some flexibility to it, which creates inconsistency in your fletching from arrow to arrow. Buy a bitz and be done with it!