Completed the Center Spar. I just had a few items to finilize. I had to cut the top flanges 45 mm to make room for the wing attachment uprights. Also fabricated the center spar uprights and then riveted them in place. Given the tight space of the top two rivets, I could not use my C frame, so I forced myself to use a bucking bar and the riveting gun. (it was great!). As the final step I drilled the A5 rivet pattern on the top flanges. Finally I assembled the two spars along with spacers and bolts. I did not rivet the top flange yet since I have a feeling that once I drill the final holes on the Center spar and wing spars, I will need to disassemble the center spar for proper deburring before the final assembly.
