Mon 20 May 2013:
Below the top tube for the fuselage that’s been ovalized with a 1″ square steel tube inside.
Above the top of the vertical tube that will be mounted into the top horizontal tube and against the fuselage. It also has a 1″ square steel tube in it with a AN5 nut welded inside.
Below the bottom of this vertical tube.
Left, the bracket that’s used to fix the top tube and the vertical tube into place.