Brief Description: Pilot drilled bottom skin to the main spar extrusi
Pilot drilled bottom skin to the main spar extrusion. Used a piece of wood as a drill stop so that the drill would not would not make smilies drilling through the thick aluminum.
In image 1 you can see where the cleco is above the bolt. Other builders have removed the Rib Attach Angle and rounded out the plate to create an area for the rivet. I had the same problem on the bottom of the main spar. See the cleco below the nut in image 2.
Top of Main Spar and forward Root Rib Attach Angle
Bottom of Main Spar and forward Root Rib Attach Angle