Mark 2 of the pinch valve uses the entire 180 rotation of the cheap servo but will hopefully have enough torque. I could shrink the length of the larger component slightly. It's unclear to me how this would work in a water line since this in effect would need to create 2 bends to keep the line running the same direction, but maybe if there is enough slack it would be OK either way. Need to hook this up to a different controller to get the full rotation, since the one I soldered previously had resistors selected for 45deg.