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) { 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] ]); } else if (two_holes_type == "mirror") { module railRectSet(height, scale=1) { holeWidth = 5.08; //If you want the hole on the cylindrical edge of a pot rotary_knob_row = top_row - 30; working_width = width_mm - h_margin; working_height = height - v_margin; working_increment = working_height / (8+tolerance/5); // generally-useful spacing amount for vertical columns of stuff col_left = h_margin; bottom_row = v_margin + 12; row_1 = vertical_space/7; row_2 = row_1 + v_margin + 12; //knob_radius top_row = height.

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