Step #3: clamp both to a flat plate and weld. Note
that the cut is far enough away from the tip s the heat won't affect the
hardness of blade where it matters.
Step#4: Grind, grind and more grind until the final shape is achieved
then finish with abrasive paper and diamond plates.
A little more work with a diamond plate and the
sanding marks won't be as obvious - at present they are highlighted by the
camera flash, don't show up in real life.