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Also not counted. KnobHeight = 20; shaft_radius = 3.25; shaft_smoothness = 20; // How much horizontal space needed for left-hand and right-hand sub-panels left_panel_width = 12*3 + tolerance*2; //three knobs plus space between them right_panel_width = width_mm - thickness*2; union() { shape(fsh, cird+cdp*smt/100, cord, cfn*4, chg); knurled_finish(cord, cird, clf, csh, cfn, crn); else if ( hsh >= 0 ) { rotate_extrude(convexity=10, $fn=fn4) polygon(points=[ [x0,y0],[x1,y0],[x1,y1],[x2,y2], [x2,y3],[x1,y4],[x1,y5],[x0,y5] ], paths=[ [0,1,2,3,4,5.