Quick Release plate clamp stuck
I have a fairly new Gitzo travel tripod and head. The knob that tightens and releases the plate on the tripod does not release the clamp. The clamp is fixed tight onto the plate and will not release. When I turn the knob, the knob just spins until the end of the screw but the clamp doesn't move. Anyone have any ideas before I take a hammer to this thing and get the plate out?