Even edge lengthes can also be achieved with "Loop Tools", an addon that comes with Blender already in version 2.66. It was programmed by Bart Crouch, the same guy who programmed the F2-addon. I use booth addon quite often. The options "Relax" (softening sharp edge direction changes) and "Space" (making even egde lengthes within an selected sequence of edges) are the functions I use the most. As with the F2-addon, you have to press "G" after the operation in order to make the selected vertices snap onto the target mesh's surface since these addons don't trigger a snapping. Thanks to Bart for these digital lifesavers 👍😀!!!