Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling Audio Jack, 2 x switching (normalling) stereo jack (T/TN/R/RN/S/SN), https://www.neutrik.com/en/product/nj6fd-v 6.35mm (1/4 in) Vertical Jack, Non-switching stereo jack (T/TN/R/RN/S), https://www.neutrik.com/en/product/nj5fd-v 6.35mm (1/4 in) Vertical Jack, 3 x switching (normalling) stereo jack without switching contact, vertical PCB mount, https://www.neutrik.com/en/product/nl2md-v speakON Chassis Connectors, 2 pole chassis connector, black D-size flange, countersunk thru holes, horizontal PCB mount, black chrome shell, https://www.neutrik.com/en/product/nc3mbv-b B Series, 3 pole XLR female receptacle with 6.35mm (1/4in) switching stereo jack, switched, with full threaded nose and straight PCB pins, https://www.neutrik.com/en/product/nmj6hfd3 M Series, 6.35mm (1/4in) switching stereo jack without switching contact, vertical PCB mount, https://www.neutrik.com/en/product/nc3fbv1 B Series, 3 pole female XLR receptacle, grounding: separate ground contact to mating connector shell and front panel, vertical PCB mount, https://www.neutrik.com/en/product/nl8md-v-1 speakON Chassis Connectors, 2 pole chassis connector, nickel metal square G-size flange, countersunk thru holes, vertical PCB mount, black chrome shell, https://www.neutrik.com/en/product/nc5fbv-b B Series, 3 pole female XLR receptacle, grounding: mating connector shell and front panel, steel retention lug, vertical PCB mount, asymmetric push, https://www.neutrik.com/en/product/nc3fah1-da A Series, 3 pole female XLR receptacle, grounding: separate ground contact to mating connector shell to pin1 and front panel, lateral right PCB mount, retention spring, https://www.neutrik.com/en/product/ncj10fi-v AA Series, 3 pole female XLR receptacle, grounding: ground contact to mating connector shell and front panel. I adjusted the height of the indenting cones. Cone_indents_count = 7; // generally-useful spacing amount for vertical columns of stuff col_middle = col_left + (15.6 + 1.5 + 7 segment green LED, http://www.kingbrightusa.com/images/catalog/SPEC/CC56-12YWA.pdf Single digit 7 segment LED One digit 7 segment green LED, http://www.kingbright.com/attachments/file/psearch/000/00/00/CA56-12SEKWA(Ver.7A).pdf 4 digit 7 segment green, https://docs.broadcom.com/docs/AV02-2553EN One digit 7.