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adding hollowness to the blade. Most wedges aren't "true" wedges, but have some degree of hollowing. This focuses the hone to the very edge of the razor, so you are not honing the entire side of your...

Short of major restoration work (regrind) try yet another piece of tape to that spine. You can shave with it, but I'll bet you'll have to use a pasted strop - alot.