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BackStem_height + nothing, = stem_radius, r2 = stem_transition_radius, $fn = smooth } module knurled_finish(ord, ird, lf, sh, fn, rn [ ord*cos(lf2), ord*sin(lf2), h2] echo(" Knurled Surface Library v2 "); echo(" values may be available at http://www.thingiverse.com/thing:9095 * for a work based on.