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D-shaped hole, set this to a D-shaped shafthole cross-section. 0 to keep it round. [mm] shafthole_cutoff_arc_height = 0.35; /* [Stem (optional)] */ // Line segments for a full circle. NOT IMPLEMENTED YET. Quality = "preview"; // ["fast preview", "preview", "rendering", "final rendering"] // Top radius of the rail + a safety margin // margins from edges v_margin = hole_dist_top*2; v_margin = hole_dist_top*2 + thickness; width_mm = hp_mm(h); difference() { difference() { difference() { union() { shape(fsh, cird+cdp*smt/100, cord, cfn*4, chg); module shape(hsh, ird, ord, fn4, hg y0=-0.1; y1=0; y2=abs(hsh); y3=hg-abs(hsh); y4=hg; y5=hg+0.1; if ( hsh >= 0 module knurled_finish(ord, ird, lf, sh, fn, rn) { for(j=[0:rn-1]) assign(h0=sh*j.

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