located, drilled and mounted fin fwd spar. located main fin spar and drilled F12 for mounting bolts. with fin spar in place, marked location for fin center rib to coincide with top of aft fuselage skin and mounted center rib to spar. Verify that center fib flange faces down. Fin fairing needs to fit up under the flange edge.
Fit fairing flange to slip under vert stabilizer. Then only 4 screws into fuselage. Quicker to remove and better fairing
