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I got to 19 hours with the polishing and I can still see a hint of grey near the the edge, so I'll give it a few more hours because once I start the figuring, the edge will get very little further polishing.
On the other hand, the figure is quite nice and spherical, with a bit of raised edge. I tried to capture a ronchigram, outside of focus, with a handheld camera.
Also I improvised a pitch hardness tester today. Seems to work ok.
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