I finally had a few minutes to work on things so I tested out the neck pocket template. As it turns out practice & testing are a good thing. I thought the template looked a bit irregular, and it was.
Big, uneven gap here.
I can still hold up the test 2 x 4 with the neck, after it is about 1/2 inch out of position.
I'll make a new template tomorrow, or several if needed. Now I'm going to drink beer & watch baseball.