Today I fixed the problem of the oversized hole. Following Van's advice, I cutoff the rib's flange and replaced it with a new fabricated flange that will get riveted to the rib's web (as seen on the picture with four rivets : probaby overkill).



Then the whole horizontal stab. got prepared for priming : deburring and dimpling.
Sabine came to help with deburring the skins.