Uploaded February 2012 | Updated September 2026, 2 weeks ago
Knife's Edge on the tester is on the right, but the video is taken through a little "scope" installed on the tester that rotates the image 180 degrees. Taking that into account I have to invert the location of the Knife's Edge to the left to accommodate the inverted image. I have a pronounced Turned Up Edge and a central "mound" with a "button". I originally thought it was a turned down edge, so I'm extremely glad it isn't... Need to do long strokes with mirror on top to correct the edge.
Knife's Edge on the tester is on the right, but the video is taken through a little "scope" installed on the tester that rotates the image 180 degrees. Taking that into account I have to invert the location of the Knife's Edge to the left to accommodate the inverted image. I have a pronounced Turned Up Edge and a central "mound" with a "button". I originally thought it was a turned down edge, so I'm extremely glad it isn't... Need to do long strokes with mirror on top to correct the edge.
