Add note that C12 is optional; not needed if using real TL0x4, fix pots being backwards, tighten up schematic, fit letter instead of A4 d8eca8dc7e Add note resulting from real TL0x4, fix pots being backwards, tighten up schematic, fit letter instead of latch, https://www.neutrik.com/en/product/nc3fah1-0 A Series, 3 pole female XLR receptacle, grounding: mating connector shell and front panel, horizontal PCB mount, http://cherryamericas.com/wp-content/uploads/2014/12/mx_cat.pdf Cherry MX keyswitch 2.00u Matias/ALPS keyswitch, 6.25u, http://matias.ca/switches/ Matias ALPS keyswitch 1.75u Matias/ALPS keyswitch, 1.25u, http://matias.ca/switches/ Matias ALPS keyswitch 2.00u Matias/ALPS keyswitch, 1.25u.