Add note that C12 is optional; not needed if using real TL0x4, fix pots being backwards, tighten up schematic, fit letter instead of latch, https://www.neutrik.com/en/product/nc3fahr2-0 A Series, 3 pole female XLR receptacle, grounding: mating connector shell and front panel, vertical PCB mount, https://www.neutrik.com/en/product/nl4md-v speakON Chassis Connectors, 2 pole chassis connector, red D-size flange, mirrored self tapping screw holes (A-screw), horizontal PCB mount, asymmetric push, https://www.neutrik.com/en/product/nc3fav1-da A Series, 3 pole male XLR receptacle.