Ground needed, probably up to 1amp - maybe not as efficient as a full bridge rectifier; could use larger spacing on the footprint. Some options: Bourns PTL series, such as: Update README.md 3e868f13c4dc33c20ca33a0cc8f51c9d63e1c081 updated C14 footprint, traces, groundplane 2cbdb94ba9 updated C5 footprint & tracing; schematic annotation update with full threaded nose and offset PCB pins, gold plated contacts, fully threaded nose, https://www.neutrik.com/en/product/nrj6hh Slim Jacks, 6.35mm (1/4in) stereo jack, vertical PCB mount, retention spring, https://www.neutrik.com/en/product/ncj10fi-h Combo I series, 3 pole female XLR receptacle, grounding: separate ground contact to mating connector shell to pin1 and front panel, vertical PCB mount, http://cherryamericas.com/wp-content/uploads/2014/12/mx_cat.pdf Cherry MX keyswitch, 2.75u, http://matias.ca/switches/ Matias ALPS keyswitch 1.25u Matias/ALPS keyswitch, 1.75u, http://matias.ca/switches/ Matias ALPS keyswitch 2.00u Matias/ALPS keyswitch, 2.75u, PCB mount, https://www.neutrik.com/en/product/nc3mbh-0 B Series, 3 pole male XLR receptacle, grounding: without ground/shell contact, lateral right PCB mount, asymmetric push, https://www.neutrik.com/en/product/nc3faah1-da AA Series, 3 pole female XLR receptacle, grounding: separate ground contact connected to shell ground, but not to front panel and pcb into different files Add a front-panel PCB "net_color_mode": 1, "opacity": { More tweaks after pro review "extra_units": "error", "global_label_dangling": "warning", "hier_label_mismatch": "error", "label_dangling": "error", "lib_symbol_issues": "warning", More tweaks.