I finally received the Monopod yesterday. I mounted the Manfroto head and Kirk AS clamp. The tripod is plenty tall for me, so I can tilt it at a angle by putting the foot out away from me, this works well to stabilize it.
One thing I learned with the head, it doesn't rotate so when mounting a lens by its tripod foot, I have to loosen the head and rotate it 90 degrees if I want to mount the camera and a smaller lens like my 24-70mm f/2.8 L. It doesn't take long, but its something to slow you down if you are changing lenses in the field.
I have only used it with my 5D MK III and 24-70 and 100-400L + 1.4 TC, it does work well with that combination.
The leg locks do tighten nicely, the anti rotation feature works, and finger tight is all you need.
Here are a couple of shots takes just after I received it to test our f/8 AF with my 100-400L
This is a distant shot of a neighbors flag pole, over 1/4 mile away so there is haze.
This is a woodpecker on out crabapple tree about 30 ft away I cropped it to a small fraction of its size. Even at 580mm, you need 4X that much to fill a frame. There were some nasty shadows that I lightened up, I should have used my better beamer, but the bird would have been gone by then. I did a quick AFMA be looking at a image and estimating the value based on my experience. It seems to be pretty close.