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/nc3fav1-0 A Series, 5 pole male XLR receptacle, grounding: separate ground contact to mating connector shell and front panel, horizontal PCB mount, https://www.neutrik.com/en/product/nc4mav B Series, 3 pole XLR female receptacle with 6.35mm (1/4in) stereo jack, horizontal PCB mount, https://www.neutrik.com/en/product/ncj10fi-h-0 Combo I series, 3 pole female XLR receptacle, grounding: separate ground contact to mating connector shell and front panel, vertical PCB mount, https://www.neutrik.com/en/product/ncj6fa-v Combo I series, 3 pole XLR female receptacle with 6.35mm (1/4in) stereo jack, horizontal PCB mount, asymmetric push, https://www.neutrik.com/en/product/nc5fah-da A Series, 5 pole female XLR receptacle, switching contacts, grounding: separate ground contact to mating connector shell to pin1 and front panel, horizontal PCB mount, https://www.neutrik.com/en/product/nc3mbh B Series, 3 pole male XLR receptacle, grounding: without ground/shell contact, lateral left PCB mount, https://www.neutrik.com/en/product/nc3faah2 AA Series, 3 pole XLR female receptacle with 6.35mm (1/4in) stereo jack, switched, fully threaded nose, sleeve contact/front panel connection, https://www.neutrik.com/en/product/nrj6hf-1-au Slim Jacks, 6.35mm (1/4in) jack receptacle, vertical pcb mount, https://www.neutrik.com/en/product/nlj2md-h speakON Combo, 2 pole chassis connector, grey D-size flange, countersunk thru holes, vertical PCB mount, asymmetric push, https://www.neutrik.com/en/product/nc5fah-da A Series, 5 pole female XLR receptacle, grounding: separate ground contact to mating connector shell and front panel, horizontal PCB mount, retention spring instead of latch, https://www.neutrik.com/en/product/nc3faav2-0 AA Series, 3 pole XLR female receptacle with 6.35mm (1/4in) mono jack, switched, gold plated contacts, fully threaded nose, https://www.neutrik.com/en/product/nrj6hf Slim Jacks, 6.35mm (1/4in) mono jack (T/S), https://www.neutrik.com/en/product/nj2fd-v 6.35mm (1/4 in) Vertical Jack, 3 x 6mm drills 3 pin Molex header 2.54 mm spacing | | | S3 | 1 | 1uF | Film capacitor | | | | S1.