Deburred F-782B R/L bracket edges and holes. Countersunk holes for the nutplates and assembled the brackets. Cut outer flanges of some of the grommets to fit. Started mocking up potential designs for a reinforcement plate to go on the F-783B brackets that are riveted to the spar and not easily replaced. The new fuel and brake line holes overlapped existing holes in the bracket. I decided to change the location of all three holes starting with centering the fuel line hole around the fuel line since the location is fixed by the Aircraft Specialties hard line. The circles on the template are the OD of the grommets. Looked up West Systems fiberglass materials that I have on the Aircraft Spruce website. Downloaded and looked at the West Systems products manual. Researched and downloaded data sheets for fiberglass cloth.