Two words......kerosene "flux" At least for the intial welding pass.

Bruce Bump is making one that will take blades up to 3 inches wide.

For a simple "teardrop" shaped notch, I just used a drill press and my bandsaw and shaped it with little files from HD.

another options is fine belts and finish with the finest Scotchbrite belt that you have.

I have the 36 and 72 inch models. Aside from being pretty cool for grinding old school SHALLOW hollow grinds like you would get from a big wheel(hand...