Watched more of the SportAir Online fiberglass course. Made holes and tested grommet and fuel and brake line clearance in sample sheet of 0.040" aluminum. Decided: FUEL: Fuel line holes 0.790" for clearance of the nut with AN931-8-13 grommet was the best option. The grommet fits the bracket hole about right. The grommet hole is about .36" in diameter larger than the fuel line. The clearance provides enough room to install the grommet in the bracket after the fuel line is inserted and to allow the fuel line to angle through the bracket for better routing. A -7-11 grommet could also work, but it is too small for the hole and pulls out easier. I used a 20mm Unibit step drill. BRAKE: Brake line holes about 0.690" for clearance of the nut 0.630 nut on the fitting with AN931-7-11 grommet was the best option. The brake hose is 3/8" OD and the grommet ID is 7/16" which provides enough room to install the grommet with the hose inserted. A 0.630 hole in the bracket made it almost impossible to install the grommet with the hose inserted without cutting the grommet so it isn't a complete circle. I was concerted that this wouldn't protect the brake hose as well and might be easier to pull out. I used a 11/16" unibit step drill. WIRING: The wiring hole is the 5/8" Van's recommended hole with a hard plastic snap in bushing. The wires will be inserted through the bushing after installation of the bracket. I used a 5/8" unibit step drill. The best hole layout seemed to be: 1) Placing the bottom edge of the large fuel line hole 1/2" above the bottom of the bracket and the aft edge of the hole as close as possible to the spar. This allows the best routing of the fuel line through the landing gear mount. 2) Leaving the wiring hole in the Van's designated location. 3) Placing the brake line hole between the other holes and as far away from the spar as possible. I drilled the replacement F-782B R/L brackets using a clamp on the drill press. The center of the fuel line hole was on the edge of one of the prepunched holes so I used a 0.040" sheet of aluminum on top of the bracket to start the hole in the desired position with a # 40 drill. Then I slowly enlarged the hole with a unibit until the prepunched hole was drilled out. Then I finished enlarging the hole to the final size after verifying the hole was still centered in the desired location.