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BackBe centered around the top surface of the rail + a safety margin // margins from edges h_margin = hole_dist_side + thickness; v_margin = hole_dist_top*5; width_mm = hp_mm(width); // where to put the output jacks row_2 = row_1 + vertical_space/7; row_7 = row_6 + vertical_space/7; cv_in_1a = [left_col, row_6, 0]; audio_in_1 = [left_col, row_2, 0]; cv_2b_atten = [right_col, row_3, 0]; pwm_duty = [width_mm - h_margin - working_width/8, row_3, 0]; cv_in_2b = [right_col, row_5, 0]; audio_out_1 = [right_col, row_1, 0]; pwm_in = [width_mm - h_margin - working_width/8, row_3, 0]; pwm_duty = [second_col, third_row, 0]; fm_lvl = [h_margin+working_width/8, row_3, 0]; pwm_duty = [input_column, bottom_row, 0]; pwm_duty = [input_column, bottom_row, 0]; fm_in = [h_margin+working_width/8, row_4, 0]; left_rib_x = thickness + 6 + tolerance; // rib + half a jack col_right = width_mm - thickness; // column from edge plus hole radius h_wall(h=4, l=slider_spacing * 10 + center_adjust; right_col = width_mm - h_margin; input_column = h_margin; col_middle = col_left + (15.6 + 1.5 + 7 segment SA39-11 SC39-11 SA39-12 SC39-12 Ferrite, vertical, LairdTech 28C0236-0JW-10, https://assets.lairdtech.com/home/brandworld/files/28C0236-0JW-10.pdf, JW Miller core https://www.bourns.com/products/magnetic-products/j.w.-miller-through-hole-ferrite-beads-emi-filters Ferrite vertical LairdTech 28C0236-0JW-10 Circular Fiducial, 0.5mm bare copper, 2.25mm soldermask opening Circular Fiducial, 1mm bare copper, 2mm soldermask opening Circular Fiducial, 1.5mm bare copper, 3mm soldermask opening Circular Fiducial, 0.75mm bare copper, 1.5mm soldermask opening (Level A Circular Fiducial, 1mm bare copper, 1.5mm soldermask opening Circular Fiducial, 1mm bare copper, 1.5mm soldermask opening (Level B Circular Fiducial, 0.5mm bare copper, 1.5mm soldermask opening (recommended 5-pin SAW.