I use a dremel with a cutoff wheel and go slow. Have a wet rag near by to cool it down then take some material out. With its proximity to the ricasso, there will be stresses there due to going from full thickness of the tang to the thickness of the blade and I don't think any added stress would be good thing.
Once I score the blade with a scribe, spaced out with a ruler, I will go to my dremel with one cutoff wheel. You can use two stacked, but I find it to be cumbersome and I would rather file out the remaining stock manually then go for speed. While the blade is held in the jaws of a vice and while holding the dremel between your thumb and pointer finger with your finger resting on the tang, rock the dremel down, using your pointer as a pivot, to see where it will make contact, adjust if necessary, then kick it on and make your first notch. Power down then move to the next line.
Wash, rinse, repeat.
Regarding files, I use a bastard, various Diamond, and sometimes the dremel on its slowest setting to just brush out areas lightly. I will also round out the corners I make while cutting my jimping with my files, then smooth it all out with 400-600 grit SiC sandpaper.
Some of them are a little wonky, I will straighten them out next weekend, but for now she is functional... I also gave my scales a once over with 60 grit. To say that I was Surprised at the amount of grip it added is
More than an understatement. I washed my knife down, scales and all, and even while soap covered I felt I had a Fantastic grip, possibly more so than on my micarta scales on my 4...
I think I am going to redo
Every Becker I have with 60 grit for the scale treatment.



