diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..4c7ce78
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "SolidPython"]
+	path = SolidPython
+	url = https://github.com/SolidCode/SolidPython.git
diff --git a/SolidPython b/SolidPython
new file mode 160000
index 0000000..a6822d5
--- /dev/null
+++ b/SolidPython
@@ -0,0 +1 @@
+Subproject commit a6822d518859efe9c3a08074dfa258e8cff1962d
diff --git a/solidpython.ipynb b/solidpython.ipynb
index bd0ad1d..6212251 100644
--- a/solidpython.ipynb
+++ b/solidpython.ipynb
@@ -12,7 +12,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": null,
    "id": "a75c573b",
    "metadata": {
     "tags": []
@@ -78,7 +78,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 33,
+   "execution_count": null,
    "id": "2ae63616-4044-4c6a-bf11-9ebf83f8f22a",
    "metadata": {
     "tags": []
@@ -288,21 +288,22 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 9,
+   "execution_count": 3,
    "id": "1810ff24-c0f8-4c80-adc2-6985cd52d7dc",
    "metadata": {
     "tags": []
    },
    "outputs": [
     {
-     "data": {
-      "text/plain": [
-       "'/home/jimmy/projects/Solid-Python-Demo/part.scad'"
-      ]
-     },
-     "execution_count": 9,
-     "metadata": {},
-     "output_type": "execute_result"
+     "ename": "NameError",
+     "evalue": "name 'scad_render_to_file' is not defined",
+     "output_type": "error",
+     "traceback": [
+      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
+      "\u001b[0;31mNameError\u001b[0m                                 Traceback (most recent call last)",
+      "Cell \u001b[0;32mIn[3], line 1\u001b[0m\n\u001b[0;32m----> 1\u001b[0m \u001b[43mscad_render_to_file\u001b[49m(part, \u001b[38;5;124m\"\u001b[39m\u001b[38;5;124mpart.scad\u001b[39m\u001b[38;5;124m\"\u001b[39m)\n",
+      "\u001b[0;31mNameError\u001b[0m: name 'scad_render_to_file' is not defined"
+     ]
     }
    ],
    "source": [
@@ -311,13 +312,49 @@
   },
   {
    "cell_type": "markdown",
-   "id": "51cdff0e",
+   "id": "98302da6-a3ac-4386-9398-2afa67b2856c",
    "metadata": {},
    "source": [
-    "https://github.com/nickc92/ViewSCAD\n",
-    "https://solidpython.readthedocs.io/en/latest/\n",
-    "https://openscad.org/"
+    "## Convert to stl"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 26,
+   "id": "44f345ad-417a-4783-b721-847351a13f4b",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Geometries in cache: 4\n",
+      "Geometry cache size in bytes: 3344\n",
+      "CGAL Polyhedrons in cache: 1\n",
+      "CGAL cache size in bytes: 24912\n",
+      "Total rendering time: 0:00:00.018\n",
+      "   Top level object is a 3D object:\n",
+      "   Simple:        yes\n",
+      "   Vertices:       18\n",
+      "   Halfedges:      54\n",
+      "   Edges:          27\n",
+      "   Halffacets:     22\n",
+      "   Facets:         11\n",
+      "   Volumes:         2\n"
+     ]
+    }
+   ],
+   "source": [
+    "! openscad -o part.stl part.scad"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "ddbc58d3-c9e4-4187-908b-57f65658198a",
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {