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Module railProfile() { polygon(railProfilePoints); } module knurled_cyl(chg, cod, cwd, csh, cdp, fsh, smt echo("knurled cylinder min diameter: ", 2*cord); echo("knurled cylinder min diameter: ", 2*cird); if( fsh < 0 shape(fsh, cird+cdp*smt/100, cord, cfn*4, chg); module shape(hsh, ird, ord, fn4, hg.

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