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/nc5fah-0 A Series, 3 pole female XLR receptacle, grounding: separate ground contact to mating connector shell and front panel, lateral right PCB mount, https://www.neutrik.com/en/product/nc4fbh B Series, 3 pole XLR female receptacle with 6.35mm (1/4in) mono jack, switched, with full threaded nose and offset PCB pins, https://www.neutrik.com/en/product/nmj4hhd2 M Series, 6.35mm (1/4in) mono jack, switched, with chrome ferrule and straight PCB pins, https://www.neutrik.com/en/product/nmj6hfd2 M Series, 6.35mm (1/4in) jack receptacle, horizontal pcb mount, replaces NL8MD-V, https://www.neutrik.com/en/product/nl8mdxx-v.