Me and my son have been building our own wooden arrows for about 2 years now. We started by hand, then went to a turn buckle with hook ends to hit the high spots. I finally, broke down and bought both arrow straighteners from 3 Rivers. I found that doing by hand never gets them as straight as a tool. Of everything we used, the 3 Rivers shaft tamer worked the best. The weight (4-5 lbs) of the tool with the proper smooth notch/groove is ideal. A big key is using a flat surface, finding the high spot and working the tool with the palm of your hand lightly first and rechecking. If you work it to hard you will create another high spot or bend in the shaft. But in the end I wound up straightening a dozen wooden shafts in short order. The tool works. I have used it on bare shafts and finished shafts. It will tear up any arrow clear coat if you have to work a hard bend. If you go easy the weight of the tool does the job.