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Sub-panels right_panel_width = width_mm - thickness*2; // draw panel, subtract holes // v_wall(h=4, l=height-rail_clearance*2-thickness); // top edge or circumference using cones or cylinders arranged in a circle. When using many narrow cylinders you can unzip into the space of 5 out_working_increment = working_increment * 4 / 5; row_2 = row_1 + v_margin + 12; title_font = 10; // Center adjust to shift left and right columns toward the center center_adjust = 5; //mm left_col = 10 + center_adjust; right_col = width_mm - thickness*2.5 - tolerance*6; out_row_8 = working_increment*7 + out_row_1; out_row_6 = out_working_increment*5 + out_row_1; out_row_4 = working_increment*3 + row_1; row_4 = row_3 + vertical_space/7; row_6 = row_5 + vertical_space/7; row_5 = working_increment*4 + row_1; row_5 = row_4 + vertical_space/7; row_6 = row_5 + vertical_space/7; cv_in_1a = [left_col, row_3, 0]; right_rib_x = width_mm - thickness*2; // draw panel, subtract holes union() { cube([board_width, board_height, thickness]); cylinder(thickness+standoff_height, r=standoff_radius, $fn=360); cylinder(h=thickness+standoff_height, r=standoff_radius, $fn=360); cylinder(h=thickness+standoff_height, r=standoff_radius, $fn=360.