Ken,
I've tried out about every wood arrow straightener out on the market at one time or another. None of them work better than hand straightening and a little heat if necessary. You also didn't state what type of wood shafting. The ace and most other will work ok on ceder, pine, sitka and other soft woods but never had any luck with them on hickory, ash, birch or other hardwood shafting. If I had to choose a straightener for soft wood shafting, the Ace would be the best on finished shafting and the hook straightener is the most effective on raw shafting.