When pressing the hem under, I could not get the side seam curve to cooperate no matter how many times I tried. I finally ended up cutting a little tab of fabric and stitched it with the yellow thread. (To avoid too much yellow, I used the matching blue thread to stitch the actual hem.) This worked so well I think I'll use this treatment on all shirts with hems that curve in so sharply, including Mikey's button-ups.
Other than that, construction was pretty standard: I used French seams on the shoulder and side seams and cut bias tape to finish the arm holes.