The old version had multiple parts, the lower piece formed a tray for the skirt to rest in, shown here on the right...





Unfortunately this design created a dirt trap from the back side, and a rain trap from the front side, and the two together combined to have most of our sample rusted away. So our main objective with the new design was to eliminate anything from catching rain/water from the outside. The back side of the hem on the new one is tight but about enough space to slide a piece of 220 paper in there to abrade. After that we plan on flooding with epoxy primer, and when that has set, seam sealer to fill in and prevent any water from laying.