here are the rear two fuselage sections
and the inner liner. Dry fit first
installed liner ( glue the back edge only )
Now install the rear frame ( 10 ). This shapes the fuselage round as well as supports the exhaust duct ( and is the only glue location for the duct ).
dry fit the exhaust duct
I decided to add locating/floating tabs to the inner liner. This will allow the exhaust duct to properly be located without gluing as there is a real space ( used for the fuselage interior skin cooling from the hot duct exterior ).
Exhaust duct in place and properly positioned
It is glued to frame 10 and floats at the rear.
as a note: all the beautiful art work on the exhaust duct exterior will not be visible when installed
( only the very ends of the exhaust nozzle 2D doors ).
Isaac