I'm building a spine tester as per an article I read in an old Trad. Bowhunter mag,and am having trouble getting the scale correct.Any help out there?
Give us a few more details. What type are you making?
If you have an assortment of shafts that are a known spine you can use them to make your scale with. Do a google search, there is some articles on making spine testers and they have scales you can print off. Hope this helps.