Pivot Rock Karangahake Gorge Area

I wonder if anybody has been to this rock. I was taken there about 25 years ago and woild like to find it again. I have a photo and am trying to reverse engineer the location with Google earth but am keen to get any further info. It was I think above the windows and looked down into the gorge. A good few tons in weight yet a 9 year old boy could stand on it and make it pivot and inch or two. Any ideas appreciated. Bob J.