Good Job Jon! Looks like you did it right. I've been threatening to add 16 feet to the end of my shop, but after it took so long to remodel the interior last summer, I'm not sure I want it bad enough. You made it look so easy that I may yet give it a try.
Just out of curiosity, why the 2 short floor joists in the foreground of the 4th photo?
“We should be careful to get out of an experience only the wisdom that is in it and stop there lest we be like the cat that sits down on a hot stove lid. She will never sit down on a hot stove lid again and that is well but also she will never sit down on a cold one anymore.” - Mark Twain