Installed structural provisions for O2 bottle. Fabricated doubler for Flap access panel and installed 4x 1/4"" nut plates. Fabricated angle doubler for upper band clamp brackets to mount on top of Flap access panel. Installed 4x 1/4"" nut plates on this doubler too. installed Flap access panel and used 1/2"" spacers for lower brackets due to 1/2"" offset of upper interior trim panel. Made holes in the lower sidewall carpet and upper trim panel to access nutplates. Installed band clamp brackets with 1/4"" bolts at 8 locations. Bottle fits good and secure.