Drilled holes through the fiberglass in the triangular braces for the aluminum tube.
Used 5 minute epoxy to put the top pieces of the heat duct together.
Clamped the 3 heat duct pieces to a 2 x 4 for trial fit before floxing. This took awhile to get the pieces oriented and aligned correctly.
Shop temperature set to 25 deg C and humidity 52%.
40g resign and 15.2g hardner mixed with flox and applied to the heat duct to secure the sides to the top.
Curing in progress.