Jeez - The fall sale on the D850 calls out to me with a free battery grip. I've used their battery grips since I bought my F100. Currently I use my D810 plus battery grip with my 24-70 non-AFS. However, as I've gotten older the weight reduction of the Z7 and 24-70 also calls out to me. I'm not getting any younger so maybe I'll just let it go and see what happens in the future. Maybe the next Nikon Z will have a battery grip with controls. Who knows? In the meantime, the D810 is still a pretty good performer and it does have two slots for memory cards.