Fuel System
Fuel Sump
The fuel sump is a holding tank where fuel flows from both tanks. This keeps a constant flow of fuel to the engine during manuvers. The sump also is used to vent the fuel tanks and remove impurities with a check valve.
Mark the locations for the fuel inlet, outlet, drain and vent hard points. Sand the loactions and the1/4 inch thick aluminum hard points with 40 grit. Glass hard points in place with micro-glass and 2 bid fiberglass.
Drill and tap each hard point for the proper fittings. Place the sump in proper location. Create a mounting bracket to attach it to the landing gear bulkhead. Attach brackets to back of sump and drill mounting holes through braket and bulkhead. Sand the open end of the sump flat and strait. Place the sump on the cap and trace. Cut the cap out 1/2 larger than the sump. Create a ½ inch wide flange to help seal cap on inside edge of the sump. Tape a yard stick to the edge and lay a bead of thick micro-glass from the edge of the sump to the stick. Repeat for all edges.
Sand inside sump and cap. Coat inside sump and cap with Jeffco. To seal the cap to the sump, mix Jeffco and flox and place a bead on the sump flange. Set sump on top of the cap and secure with duct tape. Let cure. Sand cap edge level with sump. Round the edges. Seal with 2 bid.
Fuel Gauge Install the lighted clear plastic fuel gauge through the inboard forward fuel bulkhead, about 4" inside both baggage compartments. Fit the sight gauge in place and mark around it. Drill a 3/4" hole through the inner skin at the top and bottom of bulkhead where the fuel bubble fits. Fill the holes with micro-glass and let cure. Sand the base of the sight gauge, and bulkhead. Glass the base in place. Drill a 1/16" hole through the sight gauge and center of each hole into the fuel strake. Sand the flat part of both sides of the clear cover. Glue the cover in place with clear or white 5 minute epoxy. Reinforce the gauge with 2 bid fiberglass. Install the LED lights in sloth provided. Fuel Line/Vent Fuel Lines Slide the AN818 nut and AN819 sleeve on the 3/8" aluminum fuel line. Flair the end of the line with an aircraft 37 degree fair tool. Bend the fuel line to fit the desired location with a spring tube bender. Remove the bender and cut line to length. Place nut and sleeve on the fuel line and flair. Attach the fuel lines from the bukhead to the fuel intake fittings on the sump and the vent tube from the sump vent to the bottom of the cross. Attach the vent lines to the horizontal arms of the cross. Bend a 180 degree line and attach to the top of the cross to one arm of a tee. From the 90 degree post attach a 90 degree line to the arrow tip end of a check valve. 
Mark the fuel line and vent locations on the rear fuselage bulkhead 3/4" from the top and 1/2" from the bottom. Drill a 1/8" hole through throught the bulkhead from the inside of the strake to mark the location on the fuselage side. Cut a 2 1/2" hole through the inner skin of the fuselage at these marks. Remove the foam and sand the area and the
1/4" thick aluminum hardpoints. Glass hardpoints in place with micro-glass and cover with peel ply. After cured drill a 7/16th hole through the center of the hardpoints and tap them for 1/4" pipe thread. Install the 90 degree 3/8" AN 822-6 fittings using permatex with teflon on the threads.
Drill a 3/8" hole in the floor behind the bulkhead which the sump is attached to. From the bottom of the tee attach a vent line that exits the floor of the plane through the hole. Cut the vent line off on a 45 degree angle protruding 1/2" from the body facing the front of the plane. drill a 1/8" hole in the back of the tube. Install the fuel valve to the fuel outlet on the sump. Attach the fuel filter and the fuel sensor and attach to a fuel line. Drill a hole through the bulkhead 
and the firewall and run the fuel line to a 90 degree bulkhead fitting. Install the electric fuel pump to the firewall level with the bulkhead fuel fitting so fuel will flow to it from the sump. Attach the inline fuel filter to the fuel pump and 
run a line to the bulkhead fitting. Now run a high pressure braided fuel line from the electric fuel pump to the mechanical fuel pump. From the outlet of the mechanical fuel pump run an aluminum fuel line to the servo. From the servo run a high presure braided fuel line to the spider injector. Drill a hole in the engine cowling flange below the electrict fuel pump and install the over flow valve and run the hose through the hole.