FWIW I did a schematic and PCB using ExpressPCB <snip> Wolfman, Thanks for creating the schematic. Did you create it using the original V3 design or Grendels one dated October 23? The difference appears to be: original V3 Teensy B4 -> Sidewinder Pin 3 Teensy B5 -> Sidewinder Pin 13 Oct 23 design ...