Trena asked for pictures of the inside of the neckline of my t-shirts. Here they are. You can see the serged edge and the stitching line.
And in the back the point where the seam of the neckband is.
Baking soda asked for instructions on how I did this. As I basically followed the instructions from the book (with only a difference in when attaching the end of the neckband together) I will not write a tutorial here, as I’m afraid that will violate copyright.