I see why folks are raving about 1-400. This combo is a good match; 1.6 crop and lightweight lens for bird hunting. So, do you still have a concern about how many 7D2s have been returned.
Lovely set Rod. Just curious since you used the 7d2 and 100-400ii, on which picture did you use the 1.4tc iii? since they all indicate 560mm which is 400 max on the 7d2