Anyway I have always hated how the quick release plates drives you crazy on most Ball Head Systems. Both Kirk or Really Right Stuff are fitted to each camera and are mounted solid, the Kirk plate also have a loop at the end of the plate. I emailed Kirk to ask if that Loop is strong enough to carry a D300/Grip and 70-200 2.8VR with my homemade r-strap thing
Both have similar Ball Heads and L brackets
Kirk cost less
So would you recommend Kirk or Really Right Stuff
Pete