diff --git a/pyzebra/app/panel_hdf_viewer.py b/pyzebra/app/panel_hdf_viewer.py
index 409a861..194104c 100644
--- a/pyzebra/app/panel_hdf_viewer.py
+++ b/pyzebra/app/panel_hdf_viewer.py
@@ -577,6 +577,7 @@ def create():
     events_data = dict(
         wave=[],
         ddist=[],
+        cell=[],
         frame=[],
         x_pos=[],
         y_pos=[],
@@ -616,6 +617,7 @@ def create():
 
         wave = det_data["wave"]
         ddist = det_data["ddist"]
+        cell = det_data["cell"]
 
         gamma = det_data["gamma"][0]
         omega = det_data["omega"][0]
@@ -671,6 +673,7 @@ def create():
 
         events_data["wave"].append(wave)
         events_data["ddist"].append(ddist)
+        events_data["cell"].append(cell)
         events_data["frame"].append(frC)
         events_data["x_pos"].append(x_pos)
         events_data["y_pos"].append(y_pos)
diff --git a/pyzebra/app/panel_spind.py b/pyzebra/app/panel_spind.py
index 1f600af..c5ece5b 100644
--- a/pyzebra/app/panel_spind.py
+++ b/pyzebra/app/panel_spind.py
@@ -24,9 +24,7 @@ def create():
     events_data = doc.events_data
 
     npeaks_spinner = Spinner(title="Number of peaks from hdf_view panel:", disabled=True)
-    lattice_const_textinput = TextInput(
-        title="Lattice constants:", value="8.3211,8.3211,8.3211,90.00,90.00,90.00"
-    )
+    lattice_const_textinput = TextInput(title="Lattice constants:", disabled=True)
     max_res_spinner = Spinner(title="max-res:", value=2, step=0.01, width=145)
     seed_pool_size_spinner = Spinner(title="seed-pool-size:", value=5, step=0.01, width=145)
     seed_len_tol_spinner = Spinner(title="seed-len-tol:", value=0.02, step=0.01, width=145)
@@ -214,7 +212,11 @@ def create():
     )
 
     async def update_npeaks_spinner():
-        npeaks_spinner.value = len(next(iter(doc.events_data.values())))
+        npeaks = len(next(iter(doc.events_data.values())))
+        npeaks_spinner.value = npeaks
+        # TODO: check cell parameter for consistency?
+        if npeaks:
+            lattice_const_textinput.value = ",".join(map(str, doc.events_data["cell"][0]))
 
     doc.add_periodic_callback(update_npeaks_spinner, 1000)