As the title suggests, I own a Manfrotto 701HDV head (as pictured) attached to 190CXPRO3 legs.

I want to remove the head, but its stuck.
I have removed the 3 set screws from underneath the head.
There is nothing to grab hold of to stop the head from just panning, i can lock the pan, but its not strong enough for the amount of force thats needed, it just still pans.

In the picture notice how narrow the silver base part is, you cant grab it, cant even fit a strap wrench around it.

any suggestions?