Here they are -- Siamese sleeves. On the last round, I cast off the steek and edge stitches, and put the two sleeve stitches on separate needles -- easier to separate that way.
.....by cutting open the steeks......Then all you have to do is the underarm seam. Pick up stitches around the armhole opening. And three-needle bind off them together!
I love this sweater -- I even love the way it looks on the wrong side!
Off to finish the sleeves, put on the buttons, and finish off the steeks -- details of that later.