So coming back to this, I watched a video a gentlemen sent me about this discussion. He taped the edge on an old sheffy, and ground the spine dead flat on a 400 grit atoma, then brought edge into line with the spine tape off. He took a blade that wouldn't sit flat, put a little extra hone wear on the spine, but made that thing true to a tee, both the bevel widths and spine widths....
I currently sent him one of my razors that rock back and forward, not heel to toe to see what he could do with it lol. If he fixes it somehow... I am going to take some serious time to learn this technique.
I have no problem rolling an x stroke a bit for heal to toe issues, but when the heal sits flat, and then the razor rocks back having the spine sit flat diagonally accross, and that heal is no longer touching the hone, I find that a not so fun experience. I've done it... but wish I never had to. I'm looking at this Geneva here in good shape that has a slight diagonal rock... really want to fix it!