I messaged you recently to help you out. I have to mention though, by having the design look a certain way and only operate under your given dimensions, you may cause quite a bit of limitations on what the design may bring to the table for performance with other possible design styles.
I can work with what you have, all day long, and get you a wonderful design with great performance, but depending on your personal preference of response output with only using a conventional type design idea, you may not get the results you are looking for. Still a possibility, and worth looking into.......just making you aware that if another design idea came along that can perform better than a sub up port back conventional br design with port in the middle, then I would not look past it if it can do much better than the idea you are looking at.
but again, it may work very well. Worth the time to take a look and see what we can come up with if you are interested.