We have a set of Sachtler Cine 150 long legs and just received their ground spreader. It uses their "eccentric clamps" for "easy" attachment. But no one here can figure out how to get the spreaders on. We have another set of Sachtler sticks that use the eccentric clamps for the feet, and we get them on by twisting each individual foot. But that is not an option with the spreader as they're attached to it. Any ideas?