Don't see how channel-lok plyers cannot work. Make sure you have a wheel in the fork. Stand from the front facing back and squeeze the wheel with your legs. Set channel-lock plyers to width-range that has the handles about 1.5-2.5-" apart when squeezed together on the lockring. Now, there's two orientations of the plyers, make sure you have it to grip tighter in the loosening direction of the lockring. Then squeeze as hard as you can on the plyers with both hands and rotate in the loosening direction for the lockring.