Step two, run through the shots on CR bird thread and acknowledge all the fantastic photos.
Now that I've done that, I'm hesitant to post my inferior shots. When one shoots close to home or has all the time in the world, it's a distinct advantage. I got Quetzal shots but the circumstance was far from ideal and I came away with poor focus and very high ISO, not to mention they are clips from a .MOV. The composition is amazing but alas.

Should I post such shots anyway?? Here is a sample.
My thought is to simply keep them as a slo mo movie where there is less concentration on detail. First chance totally rushed and not anticipating doing a movie (30fps 4k). Second chance slightly better with improved settings and 4k 60 but terrible light). 800mm with ISO 12500 - so sad!!
Overall, Costa Rican birds tend to flit into the shadows of trees and are challenging. Many of my shots are above ISO 6400 and require cropping!

My daughter shot the R with the 70-200 2.8 X1.4 and did very well.
I'd have liked to have dropped back to X1.4 with the 400 DO II but was stuck with X2 and it was an impediment, although occasionally a plus. I've now had enough experience with the 1DX2 and 400 DO II to realize what could be better but when I consider the options all have their downside. 14 fps often gives that brief second pose that is better. If there were a 500 as hand-holdable as the 400 DO and as light that would be my preference. 400 alone performs super but is not long enough and I think 500 X1.4 would be great. Of course I don't have 30 MP which would factor in, but as I said high ISO is a factor in about half of my shots.
So, for anyone that is interested those are my thoughts on my gear.
So, in summary I'm both thrilled and quite disappointed with my efforts on this probably once only trip. As I go through them I'll post the better ones (reluctantly). Costa Rica birds are indeed amazing.
Jack