diff --git a/tractocadre.ipynb b/tractocadre.ipynb
index e01ea6b..8fe32d3 100644
--- a/tractocadre.ipynb
+++ b/tractocadre.ipynb
@@ -6,16 +6,16 @@
    "metadata": {
     "collapsed": true,
     "ExecuteTime": {
-     "end_time": "2026-05-22T01:25:54.666792544Z",
-     "start_time": "2026-05-22T01:25:54.440667158Z"
+     "end_time": "2026-05-22T18:32:07.989017130Z",
+     "start_time": "2026-05-22T18:32:07.752507264Z"
     }
    },
    "source": [
     "from build123d import *\n",
     "from ocp_vscode import show, set_port\n",
     "\n",
-    "A3_largueur = 105\n",
-    "A3_hauteur = 148\n",
+    "A3_largueur = 148\n",
+    "A3_hauteur = 210\n",
     "\n",
     "stand_bordure = 5  # de chaque coté\n",
     "stand_epaisseur = 5\n",
@@ -49,24 +49,24 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "Plane(o=(-101.50, 0.00, 0.00), x=(0.00, 0.00, 1.00), z=(-1.00, -0.00, 0.00))\n",
-      "c\n"
+      "Plane(o=(-50.00, 0.00, 0.00), x=(0.00, 0.00, 1.00), z=(-1.00, -0.00, 0.00))\n",
+      "+\n"
      ]
     }
    ],
-   "execution_count": 15
+   "execution_count": 116
   },
   {
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-22T17:29:08.227823509Z",
-     "start_time": "2026-05-22T17:29:07.494508009Z"
+     "end_time": "2026-05-22T18:35:49.426903482Z",
+     "start_time": "2026-05-22T18:35:48.369326760Z"
     }
    },
    "cell_type": "code",
    "source": [
-    "A3_largueur = 105\n",
-    "A3_hauteur = 148\n",
+    "A3_largueur = 148\n",
+    "A3_hauteur = 210\n",
     "\n",
     "stand_bordure = 5  # de chaque coté\n",
     "stand_epaisseur = 5\n",
@@ -98,6 +98,7 @@
     "        Rectangle(A3_largueur - 10, A3_hauteur - 10)\n",
     "    extrude(amount=-1.8, mode=Mode.SUBTRACT)\n",
     "\n",
+    "    # extrusion du rail\n",
     "    stand_backface = faces().filter_by(Plane.XY).sort_by(Axis.Z)[-1]\n",
     "    with BuildSketch(stand_backface):\n",
     "        with Locations((0, stand_backface.width / 2)):\n",
@@ -111,9 +112,17 @@
     "                      align=(Align.CENTER, Align.MAX))\n",
     "    loft(mode=Mode.SUBTRACT)\n",
     "\n",
+    "    # rajout des renforts\n",
+    "    middle_angle_plane = Plane(origin=(stand_bordure + 10, stand_backface.center().Y, 0)).rotated(\n",
+    "        (0, -stand_angle_pied / 2, 0))\n",
+    "    with BuildSketch(middle_angle_plane):\n",
+    "        with GridLocations(0, stand_largueur - stand_bordure, 1, 2):\n",
+    "            Rectangle(10, 5)\n",
+    "    extrude(until=Until.NEXT, both=True)\n",
+    "\n",
     "cadre = cadre.part\n",
     "\n",
-    "clearance = 0.2\n",
+    "clearance = 0.5\n",
     "\n",
     "with BuildPart() as rail:\n",
     "    with BuildSketch(Plane.XY) as sk1:\n",
@@ -143,10 +152,10 @@
     "rail_joint = LinearJoint(\n",
     "    label=\"insert\",\n",
     "    to_part=rail,\n",
-    "    axis=Axis((rail.faces()\n",
+    "    axis=-Axis((rail.faces()\n",
     "               .filter_by(Plane.YZ)\n",
     "               .sort_by(Axis.X)[-1]\n",
-    "               .offset(-(A3_hauteur + stand_bordure)/2))\n",
+    "               .offset(-(A3_hauteur + stand_bordure) / 2))\n",
     "              .center()\n",
     "              + (0, 0, 3.2 / 2), (1, 0, 0)),\n",
     "    linear_range=(0, A3_hauteur + stand_bordure)\n",
@@ -156,7 +165,7 @@
     "cadre_joint.connect_to(rail_joint, position=0)\n",
     "\n",
     "# Or move to a specific position\n",
-    "cadre_joint.connect_to(rail_joint, position=0)\n",
+    "cadre_joint.connect_to(rail_joint, position=60)\n",
     "assembly = Compound(children=[cadre, rail])\n",
     "cog = assembly.center(CenterOf.MASS)\n",
     "cog_marker = Sphere(2).locate(Location(cog))\n",
@@ -168,35 +177,35 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "cc+\n"
+      "c++\n"
      ]
     }
    ],
-   "execution_count": 92
+   "execution_count": 126
   },
   {
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-22T17:26:35.126466252Z",
-     "start_time": "2026-05-22T17:26:35.071890866Z"
+     "end_time": "2026-05-22T18:10:39.214716262Z",
+     "start_time": "2026-05-22T18:10:39.161736598Z"
     }
    },
    "cell_type": "code",
-   "source": "Compound(children=[cadre, rail]).center(CenterOf.MASS)",
+   "source": "Plane.XY.rotated()",
    "id": "9c05871fcb7d0f44",
    "outputs": [
     {
      "data": {
       "text/plain": [
-       "Vector(54.041693811711, -57.5, 6.2695039269171)"
+       "Plane(o=(0.00, 0.00, 0.00), x=(1.00, 0.00, 0.00), z=(0.00, 0.00, 1.00))"
       ]
      },
-     "execution_count": 89,
+     "execution_count": 96,
      "metadata": {},
      "output_type": "execute_result"
     }
    ],
-   "execution_count": 89
+   "execution_count": 96
   },
   {
    "metadata": {