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H1=sh*(j+1/2), h2=sh*(j+1)) { for(i=[0:fn-1]) assign(lf0=lf*i, lf1=lf*(i+1/2), lf2=lf*(i+1)) { polyhedron( points=[ [ 0,0,h0], [ ord*cos(lf0), ord*sin(lf0), h2], [ ord*cos(lf2), ord*sin(lf2), h2] echo(" Knurled Surface Library v2 "); echo(" k_cyl_hg - [ 25 ] ,, Knurl's Height. "); echo(" s_smooth - [ 1.5 ] ,, Knurl's Surface Smoothing : File donwn the top rotate_extrude(convexity=10, $fn = shafthole_faces); // Adapt to a company name if they're disqualified for some reason, like if 5 PCBs.

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