/ TS) Small Signal NPN Transistor, TO-92Audio Jack, 2 x switching (normalling) stereo jack and switching ground contact, vertical PCB mount, https://www.neutrik.com/en/product/ncj9fi-v-0 Combo I series, 3 pole female XLR receptacle, grounding: mating connector shell to pin1 and front panel, horizontal PCB mount, black chrome shell, https://www.neutrik.com/en/product/nc3mbhr-b B Series, 5 pole male XLR receptacle, grounding: separate ground contact connected to the PSU?) UI: 2 5mm LEDs - Consider: 1 simple on/off switch/button/knob/etc. Latest commits for file Schematics/SynthMages.pretty/3.5mm_jack_hole_nonpcb.kicad_mod d62e7c6861 More work finding space for well-aligned, well-printed numbers // step rotary switch - 9.5mm, +5mm extra space available mini toggle pushbuttons: ample space above pcb.