I am ready to have a big serving of ribs

After fluting the first one (of 56), I am wondering if there is a best way to do the fluting. For example, where to start: at the end or in the middle. Then from there, how to progress: again from the middle or the end, etc...
I also had an interesting problem: after straightening one side, the other side looks like it needed "defluting" although I had not fluted anything on its flange...
Another thing, what about warping? What should I do if I get a warped rib, should I try to unwarp it by twisting it or should I rework the fluting?
I am sure that after a few tries all will become clear but, why not used your tries to minimize mine?
