I don't have the optional interior finishing materials such as the Side Panels refered to in this Chapter. Plus my kit did not include the Outside Hull Side Angles. The latter appear to simply hide the bolts that fix the previously installed Left/Right Hull Side Angles. So I ignored references to both of these items and carried on by rivetting the two Lower Canopy Tracks directly onto the Left/Right Hull Side Angles. Installing the two Aluminum Threaded Insert Tubes with Allen Head Bolts completed this short chapter. After I chopped 1" off each end of the Windshield Tube as instructed I swished CorrosionX inside the tube before setting it in place.