Closer inspection of the affected area. Inspection shows rivet gun and pneumatic drill tool marks. This picture shows a problem area that a stress crack would probably form. The rough corner needs to have an acceptable radius replace the ragged edge.
Drilled out the blind rivets holding F-742-L & R Aft Seat Floor to the seat floor ribs. Also drilled out the blind rivets holding F-747-L & R Baggage Floor panels to the baggage compartment ribs. I found screws and un-bucked flush head rivets beneath the removed panels.
Pre-Buy Inspection of RV-7A in Valencia, CA industrial park. I had two friends help me check out the 2011 originally purchased RV-7A Tip-Up kit. Both friends had completed RV-8s from quick-build kits.