Bends are easy to screw-up. We found that cutting and bending our longest runs first allowed us to make mistakes usable later on by trimming them and using them as A- to B-pillar spreaders or frame tie-ins. We cut the first length of tubing for our second bend about 10 inches short thanks to our amazing math skills. So we cut a second (10-inch-longer) length, estimated the amount of bend we thought we would need, subtracted about 10 degrees, bent the tubing, unloaded it from the bender, and checked to see how much more bend we would need. You can bend tubing further, but un-bending it is basically impossible.