Updrilling inner wing skin

Started updrilling the inner wing skin to 1/8. I use drill #31 on all flush SS rivets, and #30 on all non-flush SS rivets and all solid rivets (as I have used everywhere else). After having laid on my back on the concrete floor, I decided to purchase one of those car mechanic "on the back" chair/bed. But then I remembered I had some old garden chairs laying around...

up-drilled the vertical tail

When the electricity came back after the hurricane Ivar had come and gone I updrilled the vertical tail using 31 drill bit (and 30 for the tip).