Wow, NICE riveting work, Tom! Those look flawless. Nice riveting partner, too. (Can I borrow her for a while when you're finished? LOL)
Is that a red C-Frame I see reflected in the top photo? May I make a suggestion? Your dimples for the screws on the fuel tank are showing some shallow craters around them, indicating under-dimpling. If you take that C-frame out and give each one of those dimples another good solid whack or two, those shallow depressions will go away. You can thank me later, if you like. I learned this the hard way.
Keep up the great work!