In fact the ONLY panels mine has had are 1 front wing, as the old one had holes drilled in it for pull cables, the lower half of a front slam panel and the front x member box section I just changed that for fun as I needed to fully seam weld up a new one.

Part of the floor has had a stronger straight panel put in as the standard one flex too easily.

All fitted first time with not much hassle TBH