smelled burning, saw smoke

Sooo, avoid going to Fedex.....
Man I hear ya. Unfortunately this bad dizzy won't drive itself there.
It's funny how that works. It can make the brakes slip of course, but it can also make them grab, too. We normally don't do enough backing up to allow the self adjusters to work. That's why it's important to try and remember to help them out every now and then. That seal dang sure added to the issue.
I need to invest in whatever tool lets you adjust the brakes through those little oval holes in the backing plate. And see if my axle vent is plugged. Crossing fingers I don't have to do those axle seals again