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After drilling the horizontal stabilizer to A4 size, I disassembled to begin deburring and corrosion control. When I removed the skins and starting breaking down the skeleton, I saw where I had damaged 3 of the 4 rear ribs during the drilling. I don't think these ribs would pass inspection (certainly not mine!) and I'm ordering replacement ribs this week before proceeding on this assembly. Wondering if anyone else has had this issue?