I don't know about Fons and Porter but there are many of us here who prefer to put on our sashing as an L around the block if we can.
Happens that my most recent project and my current project have what I call "two long unwieldy strips" method of sashing, not all techniques work for all projects.
Are there specific things you want to know, or just that there was a good thread on it?
Edit: Knowing that I do use the term "long unwieldy" I did find this recent thread, still no mention of Fons and Porter.
How do you add sashing to your quilt?