diff --git a/notebooks/illinois_model.ipynb b/notebooks/illinois_model.ipynb
index d230111..a02d162 100644
--- a/notebooks/illinois_model.ipynb
+++ b/notebooks/illinois_model.ipynb
@@ -79,299 +79,6 @@
     "costs[\"marginal_cost\"] = costs[\"VOM\"] + costs[\"fuel\"] / costs[\"efficiency\"]"
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": 6,
-   "metadata": {},
-   "outputs": [
-    {
-     "data": {
-      "text/html": [
-       "<div>\n",
-       "<style scoped>\n",
-       "    .dataframe tbody tr th:only-of-type {\n",
-       "        vertical-align: middle;\n",
-       "    }\n",
-       "\n",
-       "    .dataframe tbody tr th {\n",
-       "        vertical-align: top;\n",
-       "    }\n",
-       "\n",
-       "    .dataframe thead th {\n",
-       "        text-align: right;\n",
-       "    }\n",
-       "</style>\n",
-       "<table border=\"1\" class=\"dataframe\">\n",
-       "  <thead>\n",
-       "    <tr style=\"text-align: right;\">\n",
-       "      <th>parameter</th>\n",
-       "      <th>C in fuel</th>\n",
-       "      <th>C stored</th>\n",
-       "      <th>CO2 intensity</th>\n",
-       "      <th>CO2 stored</th>\n",
-       "      <th>FOM</th>\n",
-       "      <th>Motor size</th>\n",
-       "      <th>VOM</th>\n",
-       "      <th>ammonia-input</th>\n",
-       "      <th>c_b</th>\n",
-       "      <th>c_v</th>\n",
-       "      <th>capacity</th>\n",
-       "      <th>capture rate</th>\n",
-       "      <th>capture_rate</th>\n",
-       "      <th>carbondioxide-input</th>\n",
-       "      <th>carbondioxide-output</th>\n",
-       "      <th>commodity</th>\n",
-       "      <th>compression-electricity-input</th>\n",
-       "      <th>compression-heat-output</th>\n",
-       "      <th>discount rate</th>\n",
-       "      <th>district heat surcharge</th>\n",
-       "      <th>district heat-input</th>\n",
-       "      <th>efficiency</th>\n",
-       "      <th>efficiency-biomass</th>\n",
-       "      <th>efficiency-electricity</th>\n",
-       "      <th>efficiency-heat</th>\n",
-       "      <th>efficiency-hydrogen</th>\n",
-       "      <th>efficiency-tot</th>\n",
-       "      <th>electricity-input</th>\n",
-       "      <th>fuel</th>\n",
-       "      <th>hbi-input</th>\n",
-       "      <th>heat-input</th>\n",
-       "      <th>heat-output</th>\n",
-       "      <th>hydrogen-input</th>\n",
-       "      <th>investment</th>\n",
-       "      <th>lifetime</th>\n",
-       "      <th>lohc-input</th>\n",
-       "      <th>methane-input</th>\n",
-       "      <th>methanol-input</th>\n",
-       "      <th>min_fill_level</th>\n",
-       "      <th>naphtha-input</th>\n",
-       "      <th>nitrogen-input</th>\n",
-       "      <th>ore-input</th>\n",
-       "      <th>p_nom_ratio</th>\n",
-       "      <th>pelletizing cost</th>\n",
-       "      <th>marginal_cost</th>\n",
-       "    </tr>\n",
-       "    <tr>\n",
-       "      <th>technology</th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "      <th></th>\n",
-       "    </tr>\n",
-       "  </thead>\n",
-       "  <tbody>\n",
-       "    <tr>\n",
-       "      <th>nuclear</th>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>0.000</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>1.2700</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>3.5464</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>0.07</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>0.326</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>3.4122</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>8594135.4</td>\n",
-       "      <td>40.0</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>14.013271</td>\n",
-       "    </tr>\n",
-       "    <tr>\n",
-       "      <th>OCGT</th>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>0.198</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>1.7795</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>4.7620</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>0.07</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>0.410</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>24.5680</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>460580.4</td>\n",
-       "      <td>25.0</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>NaN</td>\n",
-       "      <td>64.683951</td>\n",
-       "    </tr>\n",
-       "  </tbody>\n",
-       "</table>\n",
-       "</div>"
-      ],
-      "text/plain": [
-       "parameter   C in fuel  C stored  CO2 intensity  CO2 stored     FOM  \\\n",
-       "technology                                                           \n",
-       "nuclear           NaN       NaN          0.000         NaN  1.2700   \n",
-       "OCGT              NaN       NaN          0.198         NaN  1.7795   \n",
-       "\n",
-       "parameter   Motor size     VOM  ammonia-input  c_b  c_v  capacity  \\\n",
-       "technology                                                          \n",
-       "nuclear            NaN  3.5464            NaN  NaN  NaN       NaN   \n",
-       "OCGT               NaN  4.7620            NaN  NaN  NaN       NaN   \n",
-       "\n",
-       "parameter   capture rate  capture_rate  carbondioxide-input  \\\n",
-       "technology                                                    \n",
-       "nuclear              NaN           NaN                  NaN   \n",
-       "OCGT                 NaN           NaN                  NaN   \n",
-       "\n",
-       "parameter   carbondioxide-output  commodity  compression-electricity-input  \\\n",
-       "technology                                                                   \n",
-       "nuclear                      NaN        NaN                            NaN   \n",
-       "OCGT                         NaN        NaN                            NaN   \n",
-       "\n",
-       "parameter   compression-heat-output  discount rate  district heat surcharge  \\\n",
-       "technology                                                                    \n",
-       "nuclear                         NaN           0.07                      NaN   \n",
-       "OCGT                            NaN           0.07                      NaN   \n",
-       "\n",
-       "parameter   district heat-input  efficiency  efficiency-biomass  \\\n",
-       "technology                                                        \n",
-       "nuclear                     NaN       0.326                 NaN   \n",
-       "OCGT                        NaN       0.410                 NaN   \n",
-       "\n",
-       "parameter   efficiency-electricity  efficiency-heat  efficiency-hydrogen  \\\n",
-       "technology                                                                 \n",
-       "nuclear                        NaN              NaN                  NaN   \n",
-       "OCGT                           NaN              NaN                  NaN   \n",
-       "\n",
-       "parameter   efficiency-tot  electricity-input     fuel  hbi-input  heat-input  \\\n",
-       "technology                                                                      \n",
-       "nuclear                NaN                NaN   3.4122        NaN         NaN   \n",
-       "OCGT                   NaN                NaN  24.5680        NaN         NaN   \n",
-       "\n",
-       "parameter   heat-output  hydrogen-input  investment  lifetime  lohc-input  \\\n",
-       "technology                                                                  \n",
-       "nuclear             NaN             NaN   8594135.4      40.0         NaN   \n",
-       "OCGT                NaN             NaN    460580.4      25.0         NaN   \n",
-       "\n",
-       "parameter   methane-input  methanol-input  min_fill_level  naphtha-input  \\\n",
-       "technology                                                                 \n",
-       "nuclear               NaN             NaN             NaN            NaN   \n",
-       "OCGT                  NaN             NaN             NaN            NaN   \n",
-       "\n",
-       "parameter   nitrogen-input  ore-input  p_nom_ratio  pelletizing cost  \\\n",
-       "technology                                                             \n",
-       "nuclear                NaN        NaN          NaN               NaN   \n",
-       "OCGT                   NaN        NaN          NaN               NaN   \n",
-       "\n",
-       "parameter   marginal_cost  \n",
-       "technology                 \n",
-       "nuclear         14.013271  \n",
-       "OCGT            64.683951  "
-      ]
-     },
-     "execution_count": 6,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
-   "source": [
-    "costs.loc[['nuclear', 'OCGT'],:]"
-   ]
-  },
   {
    "cell_type": "code",
    "execution_count": 7,