Issue #4 : assigned K3 to D10.

Issue #2 : removed empty ref on silkscreen.
Issue #1 : thicker tracks for 5V.

cad/SolderStationMk2_hw/SolderStationMk2_hw.kicad_prl

 {
   "board": {
-    "active_layer": 42,
+    "active_layer": 0,
     "active_layer_preset": "",
     "auto_track_width": true,
     "hidden_netclasses": [],

cad/SolderStationMk2_hw/main_board.kicad_sch

@@ -683,7 +683,7 @@
   (no_connect (at 99.06 119.38) (uuid 9dc2bac8-c52e-40be-ade5-1d1ba798f2f0))
   (no_connect (at 99.06 127) (uuid d6114a92-91aa-4c32-827b-35c36095004d))
   (no_connect (at 99.06 137.16) (uuid dc0a5740-fe30-4f54-abad-695f76a68e9e))
-  (no_connect (at 73.66 134.62) (uuid dfb33366-5ee0-4320-941e-99cc0ab34bc9))
+  (no_connect (at 73.66 127) (uuid dfb33366-5ee0-4320-941e-99cc0ab34bc9))
   (no_connect (at 99.06 134.62) (uuid ff5dfef2-198e-4ca0-9713-7a3a3dad3815))
 
   (wire (pts (xy 88.9 57.785) (xy 88.9 62.865))
@@ -722,7 +722,7 @@
     (stroke (width 0) (type default))
     (uuid 30ad59f1-f1f9-4c68-b0e6-0e979a60e56f)
   )
-  (wire (pts (xy 72.39 127) (xy 73.66 127))
+  (wire (pts (xy 72.39 134.62) (xy 73.66 134.62))
     (stroke (width 0) (type default))
     (uuid 420cdc2e-80af-4655-9329-0e46099ce0c2)
   )
@@ -975,7 +975,7 @@
     (effects (font (size 1.27 1.27)) (justify right bottom))
     (uuid 8ef64ec4-c96b-4c2d-bb63-d0ffa3842485)
   )
-  (label "DISPLAY_K3" (at 72.39 127 180) (fields_autoplaced)
+  (label "DISPLAY_K3" (at 72.39 134.62 180) (fields_autoplaced)
     (effects (font (size 1.27 1.27)) (justify right bottom))
     (uuid 9054ad15-5bc9-48ee-8879-a8102b635a8e)
   )