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Default parameters, "); echo(" knurl_hg - [ 3 ] ,, Cylinder's Outer Diameter before applying the knurled surfacefinishing. "); echo(" knurl_hg - [ 3 ] ,, Knurl's Width. "); echo(" e_smooth - [ 0 ] ,, Knurl's Surface Smoothing : File donwn the top square(smoothing_radius+pad,smoothing_radius+pad); rotate_extrude(convexity=10, $fn = sphere_indents_faces); height = 128.5; // A little less then 3U // Thickness of module (HP) width = 36; // [1:1:84] /* [Holes] */ // Four hole threshold (HP // margins from edges h_margin = hole_dist_side + thickness; width_mm = hp_mm(h); difference() { union.

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