diff --git a/Wolf-tutorial-with-the-OBITools3.md b/Wolf-tutorial-with-the-OBITools3.md
index 356fc2b..82b22a9 100644
--- a/Wolf-tutorial-with-the-OBITools3.md
+++ b/Wolf-tutorial-with-the-OBITools3.md
@@ -55,11 +55,11 @@ And unzip it:
 
 We can check the average alignment score (corresponding approximately to the similarity between the sequences in the overlap):
 
-        obi stats -a score_norm wolf/aligned_reads
+	obi stats -a score_norm wolf/aligned_reads
 
-### 3. Remove unaligned sequence records
+### 3. Remove sequence records with a low overlap alignment score:
 
-	obi grep -a mode:alignment wolf/aligned_reads wolf/good_sequences
+	obi grep -p "sequence['score_norm'] > 0.8" wolf/aligned_reads wolf/good_sequences
 	
 ### 4. Assign each sequence record to the corresponding sample/marker combination