Thanks for your comments Randy.
The 1024 crop size saved at under 200kb showed bad pixelation so I reduced it to 800, still getting some pixelation but over IQ is acceptable.
Am at my limit on the top.
It's possible the the near wing is a tad sharper but consider the overhaul bird sharpness as good, the f4.0 helped with the background
I like the wing position and angles of the head and legs. I would have added canvas up top if this is all you had. I also agree a 500 wide open at f4 would be very tough to get a 6 foot wingspan bird in focus front to back. The head could use some selective sharpening.