This was weldement day. Applied masking tape to weldements and extended rivet lines. Drilled #40 holes through weldement and into structure. Removed weldements and upsized holes to 3/16 except for the 2 on each weldement that needed 1/4. Added holes on weldement wings for A5 rivets. Inside cabin, cut and drilled the 2 L angles that attach to the gear channel and cabin side. Incrementally drilled to #20 in the weldement. Drilled the starboard weldement for the seat angle holes. Didn't get to finish the other one today.