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/nc3fahl-0 A Series, Chassis connector Phoenix H male (A series layout), mates with Phoenix MSTB2,5/3-ST, horizontal PCB mount, http://cherryamericas.com/wp-content/uploads/2014/12/mx_cat.pdf Cherry MX keyswitch 2.00u PCB Cherry MX keyswitch 6.25u Matias/ALPS keyswitch, 1.75u, http://matias.ca/switches/ Matias ALPS keyswitch 1.25u plate Cherry MX keyswitch 6.25u Matias/ALPS keyswitch, 1.50u, plate mount, http://cherryamericas.com/wp-content/uploads/2014/12/mx_cat.pdf Cherry MX keyswitch, 1.75u, PCB mount, additional ground contacts, https://www.neutrik.com/en/product/nc3fbh1-e B Series, 3 pole XLR female receptacle with 6.35mm (1/4in) mono jack, switched, with full threaded nose and fishtail PCB pins, https://www.neutrik.com/en/product/nmj6hfd3 M Series, 6.35mm (1/4in) stereo jack, horizontal PCB mount, https://www.neutrik.com/en/product/nc3maav-0 AA Series, 3 pole male XLR receptacle, grounding: separate ground contact connected to trigger, gate jack is normalized\nto +12 V, and sustain voltage is taken from \npot pin 1 x 1 mm, 734-176 , 16 Pins per row, Mounting: Snap-in Plastic Peg.