diff --git a/wolf_tutorial.md b/wolf_tutorial.md
index 7e898df..909a780 100644
--- a/wolf_tutorial.md
+++ b/wolf_tutorial.md
@@ -27,7 +27,7 @@ The new database system used by the OBITools3 (called **DMS** for Data Managemen
 	Any hybrid of those 2 works too.
 
 * View names must be unique within a DMS, in other words, views can not be overwritten.
-	
+
 * All tools accept different input and output DMS.
 
 * If the output DMS is not given, the input DMS is used.
@@ -70,7 +70,7 @@ Download this archive containing the reads and the ngs file:
 
 And unzip it:
 
-		tar -zxvf wolf_tutorial.tar.gz
+	tar -zxvf wolf_tutorial.tar.gz
 
 
 1. Import the first set of reads, with :
@@ -139,11 +139,28 @@ Unlike the OBITools1, the OBITools3 make it possible to run ngsfilter before ali
 
 #### Build a reference database
 
-1. Download the sequences, or rather, just the files with mammal sequences for this tutorial:
+Building the reference database is costly in time and disk space so you can simply download this already built one:
+
+[v05_refs.fasta.gz](/uploads/fe71e2e103014d70a1bf9307e377ce2b/v05_refs.fasta.gz)
+
+With the associated taxdump:
+
+[taxdump.tar.gz](https://drive.google.com/file/d/1lMV5PWg122ZmhQtx0iq5m5iUKvVBZMUC/view?usp=sharing)
+
+And import them (note that you could import them in another DMS):
+
+		obi import v05_refs.fasta.gz wolf/v05_refs
+		obi import --taxdump taxdump.tar.gz wolf/taxonomy/my_tax
+
+You can then resume at the next part "**Clean the database**".
+
+Otherwise, to build the database yourself from the start:
+
+1. Download the sequences (except human and environmental samples):
 
 		mkdir EMBL
 		cd EMBL
-		wget -nH --cut-dirs=5 -Arel_std_mam_\*.dat.gz -m ftp://ftp.ebi.ac.uk/pub/databases/embl/release/std/
+		wget -nH --cut-dirs=5 -A rel_std_*.dat.gz -R rel_std_hum_*.dat.gz,rel_std_env_*.dat.gz -m ftp://ftp.ebi.ac.uk/pub/databases/embl/release/std/
 		cd ..
 		
 2. Import the sequences in the DMS:
@@ -164,23 +181,33 @@ For EMBL files, you can give the path to a directory with several EMBL files.
 
 5. Use ecoPCR to simulate an *in silico* PCR with the V05 primers:
 
-		obi ecopcr -e 3 -l 50 -L 150 -F TTAGATACCCCACTATGC -R TAGAACAGGCTCCTCTAG --taxonomy wolf/taxonomy/my_tax wolf/embl_refs wolf/v05_db
+		obi ecopcr -e 3 -l 50 -L 150 -F TTAGATACCCCACTATGC -R TAGAACAGGCTCCTCTAG --taxonomy wolf/taxonomy/my_tax wolf/embl_refs wolf/v05_refs
 
 #### Clean the database
 
 1. Filter sequences so that they have a good taxonomic description at the species, genus, and family levels:
 
-		obi grep --require-rank=species --require-rank=genus --require-rank=family --taxonomy wolf/taxonomy/my_tax wolf/v05_db wolf/v05_db_clean
+		obi grep --require-rank=species --require-rank=genus --require-rank=family --taxonomy wolf/taxonomy/my_tax wolf/v05_refs wolf/v05_refs_clean
 
-2. Build the reference database specifically used by the OBITools3 to make ecotag efficient:
+2. Dereplicate identical sequences:
+	
+		obi uniq --taxonomy wolf/taxonomy/my_tax wolf/v05_refs_clean wolf/v05_refs_uniq
+
+3. Ensure that the dereplicated sequences have a taxid at the family level:
+
+		obi grep --require-rank=family --taxonomy wolf/taxonomy/my_tax wolf/v05_refs_uniq wolf/v05_refs_uniq_clean
+
+
+4. Build the reference database specifically used by the OBITools3 to make ecotag efficient:
+
+		obi build_ref_db -t 0.97 --taxonomy wolf/taxonomy/my_tax wolf/v05_refs_uniq_clean wolf/v05_db_97
 
-		obi build_ref_db -t 0.95 --taxonomy wolf/taxonomy/my_tax wolf/v05_db_clean wolf/v05_db_definitive
 
 #### Assign each sequence to a taxon
 
 Once the reference database is built, taxonomic assignment can be done using the `ecotag` command:
 
-	obi ecotag -m 0.95 --taxonomy wolf/taxonomy/my_tax -R wolf/v05_db_definitive wolf/cleaned_sequences wolf/assigned_sequences
+	obi ecotag -m 0.97 --taxonomy wolf/taxonomy/my_tax -R wolf/v05_db_97 wolf/cleaned_sequences wolf/assigned_sequences
 
 ### 8. After the taxonomic assignment
 
@@ -216,7 +243,7 @@ or convert the dot file to a png image file:
 
 You will get something like this:
 
-![wolf](/uploads/7cb6d08cd5c645ee20ac49d233d2dc9a/wolf.png)
+![wolf](/uploads/12ce2dd47456baa59fcfa3d09df2643c/wolf.png)
 
 #### Export the results