diff --git a/carculator_truck/inventory.py b/carculator_truck/inventory.py
index 5ccaa86..6218d18 100644
--- a/carculator_truck/inventory.py
+++ b/carculator_truck/inventory.py
@@ -29,6 +29,15 @@ def fill_in_A_matrix(self):
         :attr:`array` from :class:`CarModel` class
         """
 
+        # Assembly
+        self.A[
+        :,
+        self.find_input_indices(("assembly operation, for lorry",)),
+        self.find_input_indices(("Truck, ",)),
+        ] = (
+                self.array.sel(parameter="curb mass") * -1
+        )
+
         # Glider/Frame
         self.A[
             :,
diff --git a/dev/test.ipynb b/dev/test.ipynb
index 90e5dd5..5e678af 100644
--- a/dev/test.ipynb
+++ b/dev/test.ipynb
@@ -413,7 +413,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.10.0"
+   "version": "3.11.8"
   }
  },
  "nbformat": 4,
diff --git a/inventories/lci-Car-db_for_REMIND_trucks.xlsx b/inventories/lci-Car-db_for_REMIND_trucks.xlsx
deleted file mode 100644
index 207ecf9..0000000
Binary files a/inventories/lci-Car-db_for_REMIND_trucks.xlsx and /dev/null differ
diff --git a/inventories/lci-Car-db_for_ei_37_trucks.xlsx b/inventories/lci-Car-db_for_ei_37_trucks.xlsx
deleted file mode 100644
index 5a855a5..0000000
Binary files a/inventories/lci-Car-db_for_ei_37_trucks.xlsx and /dev/null differ