Why hasn't anyone tried to edit the picture so the gridlines are straight again? That would be a colossal help, but the only way I have to do it is a hit-and-miss (emphasis on the 'miss') method with slever application of the "science" screensaver.
And, damn, I thought I was being clever by right-clicking. I did the same thing almost simultaneously in the headlight-geussing thread. I hope that worked better than here...