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Yep. I wouldn't have taken away from the toe. Trying to keep the same width (as much as possible) across the entire blade is what is normal. When not much blade is left it's hard to correct the heal....

If I were going to try to fix this...
First I wod use a diamond plate and reshape the edge to match the shape on the spine of the razor. That is how it was in the beginning. At that point the edge...

I'm with Mike. Wrap it in many layers of duct tape and trash it. It's beyond worth the effort. 35 to 45 bucks on ebay will get you something worth working on. Sorry to be blunt.