William it is a good shot - I think.
I would sharpen this up (capture sharpening is good and necessary) and repost it - then we could properly see whether you really have succeeded in your aims.
On a technical note remind me never to get into an argument with you - handholding was a herculean effort (and an almost unbelievable result as a consequence).
I must admit that I don't think I have ever used an aperture less than f4.0 with this lens when shooting birds - everything one can do to increase shutter speed is key to producing critical sharpness (clarity of detail).
Even with image stabilization I would go for a shutter speed of twice and thrice, if possible, the focal length of the lens - 1/1000ths or 1/1500ths in this case.
If you can afford it, alternatively hire it, a gimbal head is probably required for consistent quality with bird photography.
So, as suggested, sharpen this image and repost it.
After that we need to see the measured dimensions of your shoulders and upper arms!
BTW I am considering travelling to Southern Africa later this year but it is a tug-of-war with New Zealand at the moment.