| (Can't see this onscreen, though I can download the PDF.)
Great work—thank you. The phrase lengths are irregular, of course. You have a 3-bar introductory bit, so the whole A strain goes [3+] 11, 10, 16, 11. I wonder whether it makes more sense to pivot everything off the Bbmaj7? Then you get [7+] 11, 12, 14, 11. To my ear that catches the expanding-until-it-contracts feel of the structure. A nitpicky difference, of course, really (as far as I can tell) undecidable.