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OK, I've been rough grinding for about 6hrs with 60 grit, and my sagitta is down to 1.14mm. I should reach f/6 at 1.42.
I've run out of 60 grit, I can either wait till my next lot of 60 grit, turns up, (I should have checked my sagitta before I ordered it), or I could start on the 80, I think that mite be the go.
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