I had trimmed the starboard tank wall slightly too short, so I decided to extend the wall on the workbench rather than fill the gap during installation. I scuffed the part, laid up one layer of 400GSM twill weave CF on a waxed and PVA'd sheet of ally foil, then bedded the part in the CF and smoothed flush with the remaining vinylester resin mixed with Aerosil. I kept the whole part flat with another layer of foil and a large steel plate weighted down even further to pinch match the filler to the thickness of the part.