Nicely done.

You're lucky that your roof is a shallow enough pitch to allow you to work on it relatively easily.

Unfortunately, my roof is extremely steep. Even simple repairs like replacing a loose shingle involve hanging a ladder from the peak with hooks and holding on for dear life.

Nice!

I felt the same way when I replaced the timing chains on my truck.

Nicely done. I wouldn't worry about the shingles not matching, the sun should help with that. If it really bothers you, blend with spray paint

Nice job, that's the way I do it too. I bet you saved more than you estimate!