I found a quick start to straightening boo is to use your barbecue. I heat mine up to 350-400 and then leaving the lid closed slide the arrow into the rotisserie hole. Leave it for 20-30 seconds. The whole thing will be limpish. Straighten as best you can, use oven mitts. You can get most of the wiggles out with this. Then use your heat gun. Do a bend and then put it down, let it cool. Start with 10 or so arrows and just keep working your way through the pile, one bend, put it aside. By the time you've gone through the pile the first will be cool enough to work on the next bend. It takes practice, like most things, but after 20 or so arrows it will start to fall in place and become fairly straight forward. You will have to do a lot off them as the spine will be all over the place. You can reduce the spine with a belt sander but go slow and give them a good test bend before proceeding. One of the problems I had was overworking the nodes. If you bend them too far and have to go back they can weaken. You'll get an eye for when the node is actually straight.