Photographing Birds in Flight with the Nikon Z6iii

I recently upgraded from a Z6ii to a Z6iii. I take a lot of Birds photo and try to get as many Birds in Flight (BIF) as I can. I want to share some of my experiences with Auto Focus with you.
I am using the Nikon 100-400 f/4 Zoom with a 1.4 Nikon teleconverter.
After reading Steve Perry’s “Secrets To The Nikon Autofocus System – Mirrorless Edition”, watching several videos from Hudson Henry and others AND doing a lot of experimentation on my own, I have the following setup that I put in the U3 mode.

Release mode H Continuous H
Focus mode AF-C Continuos AF
Color Space sRGB
Metering Matrix
White balance Auto 1
ISO sensitivity 100
- Auto ISO sensitivity control ON 100 max 12,800
Image Quality RAW
RAW recording Lossless compression
Image Area Fx
AF-Area Mode Wide L
AF-AM S Animal

I also programmed the following:
FN1 AF-Area mode + AF-ON 3D Tracking
FN2 AF-Area mode + AF-ON Single point AF
DISPLAY AF-Area mode + AF-ON Auto-area AF
Video Record Button Focus mode/AF-area mode

AF-Area mode Wide-L serves me well in most of the cases, AS LONG AS THERE IS NOTHING IN THE FRAME BEFORE THE SUBJECT!!! (like a branch a leaf or anything else) In which case the autofocus will invariably latch on to it and I get a blurry subject!
That why I have my finger always ready on the Fn2 for the reliable and Faithfull Single point.
If the bird is on a branch moving around, I would try the 3D tracking.
If the bird is between leaves, I would use Dynamic Small, which usually is good at “Punching Through”.
Here are some samples of my photos:
In Wide L