diff --git a/notebooks/41_Extracting_Clusterless_Waveform_Features.ipynb b/notebooks/41_Extracting_Clusterless_Waveform_Features.ipynb
index 2c1fc739f..6424edcd7 100644
--- a/notebooks/41_Extracting_Clusterless_Waveform_Features.ipynb
+++ b/notebooks/41_Extracting_Clusterless_Waveform_Features.ipynb
@@ -490,7 +490,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Now that we've inserted the waveform features parameters, we need to define which parameters to use for each SortGroup. This is done by the `UnitWaveformFeaturesSelection` table. We need to link the primary key `merge_id` from the `SpikeSortingOutput` table to a features parameter set."
+    "Frank Lab NOTE: if you use parameter "ampl_10_jobs_v2" instead of "amplitude" waveform extraction will be 4x faster. Now that we've inserted the waveform features parameters, we need to define which parameters to use for each SortGroup. This is done by the `UnitWaveformFeaturesSelection` table. We need to link the primary key `merge_id` from the `SpikeSortingOutput` table to a features parameter set."
    ]
   },
   {