Now re-fit the inner element into the outer element. The 5mm curve should fit nicely around each 2mm loop. Adjust as needed, paying attention to the way the two elements intersect in the middle of the piece, as this is your main design focus.
Once you are happy with how the two pieces fit together, grasp the bottom of the two elements and use a rawhide or nylon mallet to hammer the middle intersection of the two pieces. This will create divots in both wires that gently lock the elements together.
Turn the piece around now that the elements are locked together, and use your planishing or ball peen hammer to flatten the bottom half of the elements. You're primarily hammering the inner element at this point, since the bottom half of the outer element has already been hammered, so it's a bit thinner than the inner element.
Bend one of the 22-gauge half-round length into a U shape, flat side in, and hook it to the bottom of the earring, across all four wires. Choose a front and back of the earring, and ensure this loop goes across the back of the earring.
Put the earring down on your working surface so the two half-round wire ends stand up. This will be the front of your earring. Tightly cross the two ends of the half-round wire across the face of the earring, ensuring that all four inner & outer element wires are flat next to each other (not on top of each other) and tightly bound with no space between. Use your flat-nosed pliers to crimp the half-round wrapping wires into place.
Feed each end of the half-round wires through the earring and flip the piece one more time. You are now looking at the back of the piece. Tightly cross the wires again, and use your flat-nosed pliers to crimp these wires into place. The front of the earring has two wraps, and the back of the earring has three wraps.