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/nc3faah2-0 AA Series, 3 pole female XLR receptacle, grounding: without ground/shell contact, horizontal PCB mount, https://www.neutrik.com/en/product/nc4mbv A Series, 3 pole female XLR receptacle.