Like Bill, I have made hundreds of cane arrows, several different kinds of cane. I spine test and weigh them because people are always asking. Cane does seem to be real forgiving in the spine area. I also break all the rules that the really primitive guys espouse. I will scrape and sand them to get within spine range, if it seems the shaft can handle it, wall thickness is real important. If you do sand them, wait until they are competely cool before spine testing, also when you are straightening them, or you may find that 55 spine became 65 or even 70.