diff --git a/CSMR/CSMR-2020/csmr-2020_startCSD.xml b/CSMR/CSMR-2020/csmr-2020_startCSD.xml
index a60d38156c4eb451c8f42d0b501ac9ff7f12f995..5e36d92b4d15f53d2a45f44175fe978c739aa717 100644
--- a/CSMR/CSMR-2020/csmr-2020_startCSD.xml
+++ b/CSMR/CSMR-2020/csmr-2020_startCSD.xml
@@ -77,7 +77,7 @@
                     </undercarriage_retractability>
                 </undercarriage_definition>
                 <tank_definition description="Energy tanks information">
-                    <tank ID="0" description="One Tank">
+                    <tank ID="0" description="Inner left tank">
                         <energy_carrier_ID description="see energy carrier specification node">
                             <value>0</value>
                             <unit>1</unit>
@@ -97,7 +97,7 @@
                             <upper_boundary>1.0</upper_boundary>
                         </energy_share>
                     </tank>
-                    <tank ID="1" description="single tank">
+                    <tank ID="1" description="Outer left tank">
                         <energy_carrier_ID description="see energy carrier specification node">
                             <value>0</value>
                             <unit>1</unit>
@@ -117,7 +117,7 @@
                             <upper_boundary>1.0</upper_boundary>
                         </energy_share>
                     </tank>
-                    <tank ID="2" description="single tank">
+                    <tank ID="2" description="Inner right tank">
                         <energy_carrier_ID description="see energy carrier specification node">
                             <value>0</value>
                             <unit>1</unit>
@@ -137,7 +137,7 @@
                             <upper_boundary>1.0</upper_boundary>
                         </energy_share>
                     </tank>
-                    <tank ID="3" description="single tank">
+                    <tank ID="3" description="Outer right tank">
                         <energy_carrier_ID description="see energy carrier specification node">
                             <value>0</value>
                             <unit>1</unit>
@@ -157,7 +157,7 @@
                             <upper_boundary>1.0</upper_boundary>
                         </energy_share>
                     </tank>
-                    <tank ID="4" description="single tank">
+                    <tank ID="4" description="Center wing tank">
                         <energy_carrier_ID description="see energy carrier specification node">
                             <value>0</value>
                             <unit>1</unit>
@@ -177,6 +177,46 @@
                             <upper_boundary>1.0</upper_boundary>
                         </energy_share>
                     </tank>
+                    <tank ID="5" description="Additional center tank">
+                        <energy_carrier_ID description="see energy carrier specification node">
+                            <value>0</value>
+                            <unit>1</unit>
+                            <lower_boundary>0</lower_boundary>
+                            <upper_boundary>5</upper_boundary>
+                        </energy_carrier_ID>
+                        <location description="Component where the tank is located: fuselage, wing, horizontal_stabilizer">
+                            <value>fuselage</value>
+                        </location>
+                        <position description="Position of tank in location: tailcone, rear, front, top, bottom, center, inner_left, outer_left, inner_right, outer_right, total">
+                            <value>center</value>
+                        </position>
+                        <energy_share description="Share of this tanks energy in relation to required mission energy (of same energy carrier). Only relevant for liquid hydrogen tanks. Equals 0.0 for kerosene tanks.">
+                            <value>0.0</value>
+                            <unit>1</unit>
+                            <lower_boundary>0.0</lower_boundary>
+                            <upper_boundary>1.0</upper_boundary>
+                        </energy_share>
+                    </tank>
+                    <tank ID="6" description="Trim tank">
+                        <energy_carrier_ID description="see energy carrier specification node">
+                            <value>0</value>
+                            <unit>1</unit>
+                            <lower_boundary>0</lower_boundary>
+                            <upper_boundary>5</upper_boundary>
+                        </energy_carrier_ID>
+                        <location description="Component where the tank is located: fuselage, wing, horizontal_stabilizer">
+                            <value>horizontal_stabilizer</value>
+                        </location>
+                        <position description="Position of tank in location: tailcone, rear, front, top, bottom, center, inner_left, outer_left, inner_right, outer_right, total">
+                            <value>total</value>
+                        </position>
+                        <energy_share description="Share of this tanks energy in relation to required mission energy (of same energy carrier). Only relevant for liquid hydrogen tanks. Equals 0.0 for kerosene tanks.">
+                            <value>0.0</value>
+                            <unit>1</unit>
+                            <lower_boundary>0.0</lower_boundary>
+                            <upper_boundary>1.0</upper_boundary>
+                        </energy_share>
+                    </tank>
                 </tank_definition>
                 <loads description="Loads information">
                     <design_load_factor description="design load factor n">