Morgan,
With that jig you can site down and rotate the shaft to see where the corrections need to be at the same time your adding heat with a heat gun. The metal angle is to keep the wood from burning and losing shape. I start out with about 9 shafts... start with the end away from you and work straightening towards you. don't go back because you will lose areas that you have straighten because of the hot shaft. Once you have gotten to the end closest to you, lay it down to cool and start another repeating the same process. once through all 9 shafts or the shafts are cool flip the shafts and start over straightening from the other end. I usually can get a shaft straight using this jig in two sessions plus one final tweaking. Took me a while to the hang of it, but I've made hundreds of cane and boo arrows and it seams to be the easiest and quickest way for me....
DBar
