row_2 = row_1 + v_margin + 12; top_row = height - v_margin; working_increment = (working_height-v_margin+thickness) / (9); // generally-useful spacing amount for vertical columns of stuff col_middle = col_left + (15.6 + 1.5 + 7 + 8); // pot + led + switch? Col_right = width_mm - hole_dist_side, hole_dist_top); echo("Putting a hole with radius: ", hole_r , " at ", width_mm - col_right; // column from edge plus hole radius // mounting holes to PCB edge 10.889999999999999mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 44-pin D-Sub connector, horizontal/angled (90 deg), THT-mount, female, pitch 2.77x2.84mm, pin-PCB-offset 14.56mm, distance of mounting holes with circular drills, http://www.alps.com/prod/info/E/HTML/Encoder/Incremental/EC12E/EC12E1240405.html & http://cdn-reichelt.de/documents/datenblatt/F100/402097STEC12E08.PDF Alps rotary encoder, PEC12R, with switch, https://www.cui.com/product/resource/sj1-353xng.pdf TRS 3.5mm, horizontal, through-hole, with switch, https://www.cui.com/product/resource/sj1-353xng.pdf TRS 3.5mm, horizontal, through-hole, , circular holeshttps://www.cui.com/product/resource/sj1-353xng.pdf TRS audio jack stereo horizontal TRS 3.5mm, horizontal, through-hole, , circular holeshttps://www.cui.com/product/resource/sj1-353xng.pdf TRS audio jack stereo horizontal TRS 3.5mm, horizontal, through-hole, with switch, vertical shaft, http://www.alps.com/prod/info/E/HTML/Encoder/Incremental/EC12E/EC12E1240405.html Alps rotary encoder, EC12E... With switch, horizontal shaft, https://www.bourns.com/products/encoders/contacting-encoders/product/PEC09 Bourns rotary encoder, EC12E... With switch, circular holes, https://www.cui.com/product/resource/sj1-353xng.pdf TRS 3.5mm, horizontal, through-hole, , circular holeshttps://www.cui.com/product/resource/sj1-353xng.pdf TRS audio jack stereo horizontal waterproof 6.35mm (1/4 in) Vertical Jack, Non-switching stereo jack and switching ground contact, vertical PCB mount, retention spring, no latch, https://www.neutrik.com/en/product/nc3fbv1-0 B Series, 3 pole female XLR receptacle, grounding: separate ground contact to mating connector shell and front panel, horizontal PCB mount, https://www.neutrik.com/en/product/nc3fah A Series, 4 pole chassis connector, black D-size.