The -12 has been in service long enough and in sufficient numbers that minor structural nuisance areas should be showing up about now. I've seen postings about cracking in the wheel fairing mounting tabs, and I'm aware of the tank mods, and the S.B. concerning cracking in wing rib lightening holes, but not much else. Has anyone experienced an issue that might be prevented by a doubler or some other preventive measure? I'm early in the construction, so suggestions would be welcome.
