He decides to start with the frame first, of course. He makes the mold in the shape of a heater shield, but slightly larger to compensate for his size. He makes two more rods running from the center of both the horizontal and vertical sides of the shield for added stability. Right in the very center of the shield, he leaves a small hole for the second black crystal. Once the mold is done, he melts down the metal and pours it into the mold, before leaving it to harden.
When he's finished, he sits back and looks at Ammie. "So... What do you want to do for the next couple of hours while we wait for this thing to harden?" He asks with a suggestive grin.