Cut another notch in F08-08 Flap Detent Angle for 20 degree flaps, so that 10, 20 & 30 degree flap settings are available. Drill #40 & cleco F08-10 Forward Attach Angle to F14-08 L Forward Wing Attach Angle. Drill #40 & cleco F08-11 Aft Attach Angle to F14-09 L Aft Wing Attach Angle. Drill both #30 & cleco. Drill #30 & cleco F08-09 Flap Detent Angle to F08-10, -11. Step drill same up to 3/16" & cleco. No trim lever tab to be installed.