Started trimming aluminum floor panels. First two will go in. Some trimming required. Not all of the factory cutouts are well-located due to vagaries in the tube structure. I will try it as is. If the holes in the floor are too big in some areas, I will just put a small doubler on top of the sheet metal panel which fits more closely around the tubing or other protruding element. I am intending to use k1000 nutplates and #6 round head screws to attach the panels to steel tabs on the tubing. Panels will be primed with rattle can self etching primer and then painted with rattle can colour for easy repainting when desired.