David, I am attaching a sequence of photos. 1 - saw blade installed, 2 - saw blade removed showing flange and pins, and 3 - arbor with flange removed and the back side of the flange. The short pins protruding from the back of the flange mate with notches at the arbor.
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I recall seeing your remote pull-cord for the overhead guard, and had planned to implement that even before I received the saw.
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I am very interested in how to get the rip fence closer to the blade!
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John Hinman
Boise ID USA
Kappa 450X and A941