Using a good cutoff wheel, Chris cut through both pieces in the center of the overlap, peeled back the excess, and placed a tack weld about every inch or so. He aligned the gap by prying up on the floor with a small screwdriver to be sure both parts were perfectly even before placing each weld. Since the new trunk will drop down into place, he made sure to keep the cutoff wheel vertical so the gap didn't get too large. In this case, it was especially important along the front edge where the panel slopes upward. This is why you'll want to get a panel that's cut all the way out to the trunk extensions. Remember where that center brace is located so you don't hack through it.