find the assembly notes - C1: enlarge footprint; a box film cap instead of A4 c852e5d6ad8630143a633f6c4ffcb4d705a43337 Add note resulting from real TL0x4, fix pots being backwards, tighten up schematic, fit letter instead of latch, https://www.neutrik.com/en/product/nc3fahl1-0 A Series, 3 pole male XLR receptacle, grounding: mating connector shell and front panel, steel retention lug, vertical PCB mount, black chrome shell, https://www.neutrik.com/en/product/nc3fbv2-b B Series, 3 pole female XLR receptacle, grounding: mating connector shell and front panel, horizontal PCB mount, https://www.neutrik.com/en/product/nc3faah2 AA Series, 3 pole male XLR receptacle, grounding: mating connector shell and front panel, horizontal PCB mount, additional ground contacts, https://www.neutrik.com/en/product/nc3mbh-e B Series, 3 pole XLR female receptacle with 6.35mm (1/4in) mono jack without switching contact, vertical PCB mount, additional ground contacts, https://www.neutrik.com/en/product/nc3fbh1-e B Series, 3 pole male XLR receptacle, grounding: separate ground contact to mating connector shell and front panel, vertical PCB mount, https://www.neutrik.com/en/product/nc4mamh-ph A Series, 3 pole XLR female receptacle with 6.35mm (1/4in) switching stereo jack, switched, half threaded nose, https://www.neutrik.com/en/product/nsj12hf-1 Stacking Jacks, Stereo dual jack, quick fix nose, https://www.neutrik.com/en/product/nsj12hl Combo I series, 3 pole female XLR receptacle, grounding: separate ground contact.