Easy enough to do....
I made a jig from some 40*40*4mm angle...About 6 inches long. Cut an elongated hole about 20mm wide in the middle of one of the limbs, this is where the 2 halves of the blade will be placed..
Make a couple of clamps from an offcut of said angle and place around 1.5 inches from the central hole/opening.
Grind the blades to form a chamfer across the width so that when the blade ends are placed one on top of the other the ends meet with no step...Assemble and clamp onto your fixture and silver solder...Dress the joint to ensure the blade contour is uniform..
If I get chance, I'll post a piccy of mine....