diff --git a/coil_generator-12.ipynb b/coil_generator-12.ipynb
index 46df40c..e2112a8 100644
--- a/coil_generator-12.ipynb
+++ b/coil_generator-12.ipynb
@@ -79,7 +79,9 @@
     "# where to place the pins\n",
     "# CONNECTION_PINS_RADIUS = 16.5\n",
     "\n",
-    "USE_SPIRAL = False"
+    "USE_SPIRAL = False\n",
+    "\n",
+    "LAYERS = 2"
    ]
   },
   {
@@ -448,23 +450,32 @@
    "metadata": {},
    "outputs": [],
    "source": [
+    "# if we are doing four layers then duplicate the front and back layers on (front and inner1), (inner2 and back)\n",
+    "tracks_in1 = []\n",
+    "tracks_in2 = []\n",
+    "if LAYERS == 4:\n",
+    "    tracks_in1 = tracks_b\n",
+    "    tracks_in2 = tracks_f\n",
+    "\n",
     "# dump out the json version\n",
     "json_result = dump_json(\n",
-    "    \"coils_12.json\",\n",
-    "    STATOR_RADIUS,\n",
-    "    STATOR_HOLE_RADIUS,\n",
-    "    TRACK_WIDTH,\n",
-    "    PIN_DIAM,\n",
-    "    PIN_DRILL,\n",
-    "    VIA_DIAM,\n",
-    "    VIA_DRILL,\n",
-    "    vias,\n",
-    "    pins,\n",
-    "    pads,\n",
-    "    silk,\n",
-    "    tracks_f,\n",
-    "    tracks_b,\n",
-    "    mounting_holes,\n",
+    "    filename=\"coils_12.json\",\n",
+    "    stator_radius=STATOR_RADIUS,\n",
+    "    stator_hole_radius=STATOR_HOLE_RADIUS,\n",
+    "    track_width=TRACK_WIDTH,\n",
+    "    pin_diam=PIN_DIAM,\n",
+    "    pin_drill=PIN_DRILL,\n",
+    "    via_diam=VIA_DIAM,\n",
+    "    via_drill=VIA_DRILL,\n",
+    "    vias=vias,\n",
+    "    pins=pins,\n",
+    "    pads=pads,\n",
+    "    silk=silk,\n",
+    "    tracks_f=tracks_f,\n",
+    "    tracks_in1=tracks_in1,\n",
+    "    tracks_in2=tracks_in2,\n",
+    "    tracks_b=tracks_b,\n",
+    "    mounting_holes=mounting_holes,\n",
     ")"
    ]
   },
@@ -499,7 +510,7 @@
   },
   "vscode": {
    "interpreter": {
-    "hash": "fc384f9db26c31784edfba3761ba3d2c7b2f9b8a63e03a9eb0778fc35334efe1"
+    "hash": "1ce20143987840b9786ebb5907032c9c3a8efacbb887dbb0ebc4934f2ad26cb3"
    }
   }
  },
diff --git a/coil_generator-6.ipynb b/coil_generator-6.ipynb
index 8a45f9b..c65000d 100644
--- a/coil_generator-6.ipynb
+++ b/coil_generator-6.ipynb
@@ -79,7 +79,9 @@
     "# where to place the pins\n",
     "CONNECTION_PINS_RADIUS = 16.5\n",
     "\n",
-    "USE_SPIRAL = False"
+    "USE_SPIRAL = False\n",
+    "\n",
+    "LAYERS = 4"
    ]
   },
   {
@@ -493,23 +495,32 @@
    "metadata": {},
    "outputs": [],
    "source": [
+    "# if we are doing four layers then duplicate the front and back layers on (front and inner1), (inner2 and back)\n",
+    "tracks_in1 = []\n",
+    "tracks_in2 = []\n",
+    "if LAYERS == 4:\n",
+    "    tracks_in1 = tracks_b\n",
+    "    tracks_in2 = tracks_f\n",
+    "\n",
     "# dump out the json version\n",
     "json_result = dump_json(\n",
-    "    \"coils_6.json\",\n",
-    "    STATOR_RADIUS,\n",
-    "    STATOR_HOLE_RADIUS,\n",
-    "    TRACK_WIDTH,\n",
-    "    PIN_DIAM,\n",
-    "    PIN_DRILL,\n",
-    "    VIA_DIAM,\n",
-    "    VIA_DRILL,\n",
-    "    vias,\n",
-    "    pins,\n",
-    "    pads,\n",
-    "    silk,\n",
-    "    tracks_f,\n",
-    "    tracks_b,\n",
-    "    mounting_holes,\n",
+    "    filename=\"coils_6.json\",\n",
+    "    stator_radius=STATOR_RADIUS,\n",
+    "    stator_hole_radius=STATOR_HOLE_RADIUS,\n",
+    "    track_width=TRACK_WIDTH,\n",
+    "    pin_diam=PIN_DIAM,\n",
+    "    pin_drill=PIN_DRILL,\n",
+    "    via_diam=VIA_DIAM,\n",
+    "    via_drill=VIA_DRILL,\n",
+    "    vias=vias,\n",
+    "    pins=pins,\n",
+    "    pads=pads,\n",
+    "    silk=silk,\n",
+    "    tracks_f=tracks_f,\n",
+    "    tracks_in1=tracks_in1,\n",
+    "    tracks_in2=tracks_in2,\n",
+    "    tracks_b=tracks_b,\n",
+    "    mounting_holes=mounting_holes,\n",
     ")"
    ]
   },
@@ -544,7 +555,7 @@
   },
   "vscode": {
    "interpreter": {
-    "hash": "fc384f9db26c31784edfba3761ba3d2c7b2f9b8a63e03a9eb0778fc35334efe1"
+    "hash": "1ce20143987840b9786ebb5907032c9c3a8efacbb887dbb0ebc4934f2ad26cb3"
    }
   }
  },
diff --git a/coil_plugin.py b/coil_plugin.py
index 072c218..cf1f23a 100644
--- a/coil_plugin.py
+++ b/coil_plugin.py
@@ -57,15 +57,15 @@ class CoilPlugin(pcbnew.ActionPlugin):
                 # put everything in a group to make it easier to manage
                 pcb_group = pcbnew.PCB_GROUP(board)
                 # board.Add(pcb_group)
+                # find the matching net for the track
+                net = board.FindNet("coils")
+                if net is None:
+                    net = pcbnew.NETINFO_ITEM(board, "coils")
+                    board.Add(net)
+                    # raise "Net not found: {}".format(track["net"])
 
                 # create tracks
                 for track in coil_data["tracks"]["f"]:
-                    # find the matching net for the track
-                    net = board.FindNet("coils")
-                    if net is None:
-                        net = pcbnew.NETINFO_ITEM(board, "coils")
-                        board.Add(net)
-                        # raise "Net not found: {}".format(track["net"])
                     create_tracks(
                         board, pcb_group, net, pcbnew.F_Cu, track_width, track
                     )
@@ -75,6 +75,17 @@ class CoilPlugin(pcbnew.ActionPlugin):
                         board, pcb_group, net, pcbnew.B_Cu, track_width, track
                     )
 
+                for track in coil_data["tracks"]["in1"]:
+                    create_tracks(
+                        board, pcb_group, net, pcbnew.In1_Cu, track_width, track
+                    )
+
+                for track in coil_data["tracks"]["in2"]:
+                    create_tracks(
+                        board, pcb_group, net, pcbnew.In2_Cu, track_width, track
+                    )
+
+
                 # create the vias
                 for via in coil_data["vias"]:
                     pcb_via = pcbnew.PCB_VIA(board)
diff --git a/pcb_json.py b/pcb_json.py
index 93435a8..b50b5a9 100644
--- a/pcb_json.py
+++ b/pcb_json.py
@@ -67,6 +67,8 @@ def dump_json(
     pads,
     silk,
     tracks_f,
+    tracks_in1,
+    tracks_in2,
     tracks_b,
     mounting_holes,
 ):
@@ -87,6 +89,8 @@ def dump_json(
         "silk": silk,
         "tracks": {
             "f": [create_track_json(points) for points in tracks_f],
+            "in1": [create_track_json(points) for points in tracks_in1],
+            "in2": [create_track_json(points) for points in tracks_in2],
             "b": [create_track_json(points) for points in tracks_b],
         },
         "mountingHoles": mounting_holes,