Just a catch-up entry to cover a few days work off and on. Jeremy was a big help in coutnersinking some of the wing spar fuel skin attach holes.
I followed up by continuing that effort, and countersinking/drilling the access plate platenuts. Buying that caliper was one of my best purchases yet. Now if I just had better closue-up vision.
That's it for now. Am finished with the countersinking/riveting. Now I need to research the platenuts that go on the spar-web. Should be relatively easy compared to these.