Nice finish on that blade.
These
EZ lap Diamond stick, are what I use for reshaping heels, these are inexpensive, come in variety of grits, and you can totally control how much and how fast you remove material.
I have used the DMT and low grit stones, but you really can’t see what you are doing as you grind off steel. Using these diamond sticks, you rest the spine on the bench, I use a piece of craft foam to keep it from dancing and slowly remove exactly as much as you need. The blade is pretty thin here so the fine grit (about 600) works fine here).
These little sticks are very hand around the shop and you will find a dozen other uses for them.