There’s an error in the shoulders/neck shaping - worked as written you end up with the corner of the square in the middle of the collar. The stitch counts are correct, so I just adjusted my start/finish points so it ended up as shown in the pictures with the corners pointing towards each shoulder.

I used 3 needle bind offs at the shoulders and side seems and left long tails to sew up the inevitable hole under the arms. I worked the sleeves in the round.