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/nc3fahr1-0 A Series, Chassis connector Phoenix H male (A series layout), mates with Phoenix MSTB 2,5/3-ST, horizontal PCB mount, https://www.neutrik.com/en/product/nc3mav B Series.