diff --git a/ImageD11/nbGui/TDXRD/3_3DXRD_look_at_peaks.ipynb b/ImageD11/nbGui/TDXRD/3_3DXRD_look_at_peaks.ipynb
index b8d06dfa..b5ca1ae3 100755
--- a/ImageD11/nbGui/TDXRD/3_3DXRD_look_at_peaks.ipynb
+++ b/ImageD11/nbGui/TDXRD/3_3DXRD_look_at_peaks.ipynb
@@ -87,6 +87,30 @@
     "print(ds.shape)"
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "ds.phases = ds.get_phases_from_disk()\n",
+    "ds.phases.unitcells"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# now let's select a phase to index from our parameters json\n",
+    "phase_str = 'Fe'\n",
+    "\n",
+    "ucell = ds.phases.unitcells[phase_str]\n",
+    "\n",
+    "print(ucell.lattice_parameters, ucell.spacegroup)"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,
@@ -98,9 +122,7 @@
     "# load 3d columnfile from disk\n",
     "\n",
     "cf_3d = ds.get_cf_3d_from_disk()\n",
-    "\n",
-    "cf_3d.parameters.loadparameters(ds.parfile)\n",
-    "cf_3d.updateGeometry()"
+    "ds.update_colfile_pars(cf_3d, phase_name=phase_str) "
    ]
   },
   {
@@ -114,9 +136,7 @@
     "# load 2d columnfile from disk\n",
     "\n",
     "cf_2d = ds.get_cf_2d_from_disk()\n",
-    "\n",
-    "cf_2d.parameters.loadparameters(ds.parfile)\n",
-    "cf_2d.updateGeometry()"
+    "ds.update_colfile_pars(cf_2d, phase_name=phase_str) "
    ]
   },
   {
@@ -129,7 +149,7 @@
    "source": [
     "# load grains from disk\n",
     "\n",
-    "grains = ds.get_grains_from_disk()"
+    "grains = ds.get_grains_from_disk(phase_str)"
    ]
   },
   {