I have decided to undo the shoulders and redo them with short row shaping so I can do a three needle bind off to join them, but that should be easy - only 16 stitches per shoulder. I took a picture of the back pinned to my dress maker dummy so you can see how va-va-va-voom this top is going to be when finished.
Pattern: "Beyonce" Structured Tee - S. Charles Collezione
Yarn: S. Charles Collezione Nepal
Needle: US 4 (3.5 mm)