diff --git a/Detector/DetFCCeeECalInclined/compact/FCCee_ECalBarrel.xml b/Detector/DetFCCeeECalInclined/compact/FCCee_ECalBarrel.xml
index 2fd46fc..643ce53 100644
--- a/Detector/DetFCCeeECalInclined/compact/FCCee_ECalBarrel.xml
+++ b/Detector/DetFCCeeECalInclined/compact/FCCee_ECalBarrel.xml
@@ -26,7 +26,7 @@
     <constant name="LArGapThickness" value="1.239749*2*mm"/>
 
     <!-- Air margin, thicknesses of cryostat and LAr bath -->
-    <constant name="AirMarginThickness" value="54*mm"/>    <!-- Space holder for air gap between cryostat vessels --> 
+    <constant name="AirMarginThickness" value="49*mm"/>    <!-- Space holder for air gap between cryostat vessels --> 
 
     <constant name="CryoBarrelFrontWarm" value="10*mm"/>   <!-- Al solid corresponding to 0.11 X0 -->
     <constant name="CryoBarrelFrontCold" value="3.8*mm"/>  <!-- Al solid equivalent of 0.043 X0 sandwich CFRP -->
diff --git a/Detector/DetFCCeeECalInclined/compact/FCCee_ECalBarrel_calibration.xml b/Detector/DetFCCeeECalInclined/compact/FCCee_ECalBarrel_calibration.xml
index a75e248..d0207f1 100644
--- a/Detector/DetFCCeeECalInclined/compact/FCCee_ECalBarrel_calibration.xml
+++ b/Detector/DetFCCeeECalInclined/compact/FCCee_ECalBarrel_calibration.xml
@@ -26,7 +26,7 @@
     <constant name="LArGapThickness" value="1.239749*2*mm"/>
 
     <!-- Air margin, thicknesses of cryostat and LAr bath -->
-    <constant name="AirMarginThickness" value="54*mm"/>    <!-- Space holder for air gap between cryostat vessels --> 
+    <constant name="AirMarginThickness" value="49*mm"/>    <!-- Space holder for air gap between cryostat vessels --> 
 
     <constant name="CryoBarrelFrontWarm" value="10*mm"/>   <!-- Al solid corresponding to 0.11 X0 -->
     <constant name="CryoBarrelFrontCold" value="3.8*mm"/>  <!-- Al solid equivalent of 0.043 X0 sandwich CFRP -->
diff --git a/Detector/DetFCCeeECalInclined/compact/FCCee_ECalBarrel_thetamodulemerged.xml b/Detector/DetFCCeeECalInclined/compact/FCCee_ECalBarrel_thetamodulemerged.xml
index 352596c..f995786 100644
--- a/Detector/DetFCCeeECalInclined/compact/FCCee_ECalBarrel_thetamodulemerged.xml
+++ b/Detector/DetFCCeeECalInclined/compact/FCCee_ECalBarrel_thetamodulemerged.xml
@@ -27,7 +27,7 @@
     <constant name="LArGapThickness" value="1.256*2*mm"/>
 
     <!-- Air margin, thicknesses of cryostat and LAr bath -->
-    <constant name="AirMarginThickness" value="54*mm"/>    <!-- Space holder for air gap between cryostat vessels --> 
+    <constant name="AirMarginThickness" value="49*mm"/>    <!-- Space holder for air gap between cryostat vessels --> 
 
     <constant name="CryoBarrelFrontWarm" value="10*mm"/>   <!-- Al solid corresponding to 0.11 X0 -->
     <constant name="CryoBarrelFrontCold" value="3.8*mm"/>  <!-- Al solid equivalent of 0.043 X0 sandwich CFRP -->
diff --git a/Detector/DetFCCeeECalInclined/compact/FCCee_ECalBarrel_thetamodulemerged_calibration.xml b/Detector/DetFCCeeECalInclined/compact/FCCee_ECalBarrel_thetamodulemerged_calibration.xml
index eb5a9e8..e19959c 100644
--- a/Detector/DetFCCeeECalInclined/compact/FCCee_ECalBarrel_thetamodulemerged_calibration.xml
+++ b/Detector/DetFCCeeECalInclined/compact/FCCee_ECalBarrel_thetamodulemerged_calibration.xml
@@ -27,7 +27,7 @@
     <constant name="LArGapThickness" value="1.256*2*mm"/>
 
     <!-- Air margin, thicknesses of cryostat and LAr bath -->
-    <constant name="AirMarginThickness" value="54*mm"/>    <!-- Space holder for air gap between cryostat vessels --> 
+    <constant name="AirMarginThickness" value="49*mm"/>    <!-- Space holder for air gap between cryostat vessels --> 
 
     <constant name="CryoBarrelFrontWarm" value="10*mm"/>   <!-- Al solid corresponding to 0.11 X0 -->
     <constant name="CryoBarrelFrontCold" value="3.8*mm"/>  <!-- Al solid equivalent of 0.043 X0 sandwich CFRP -->
diff --git a/Detector/DetFCCeeECalInclined/compact/FCCee_ECalBarrel_thetamodulemerged_upstream.xml b/Detector/DetFCCeeECalInclined/compact/FCCee_ECalBarrel_thetamodulemerged_upstream.xml
index 1fbe265..6788d29 100644
--- a/Detector/DetFCCeeECalInclined/compact/FCCee_ECalBarrel_thetamodulemerged_upstream.xml
+++ b/Detector/DetFCCeeECalInclined/compact/FCCee_ECalBarrel_thetamodulemerged_upstream.xml
@@ -28,7 +28,7 @@
     <constant name="LArGapThickness" value="1.256*2*mm"/>
 
     <!-- Air margin, thicknesses of cryostat and LAr bath -->
-    <constant name="AirMarginThickness" value="54*mm"/>    <!-- Space holder for air gap between cryostat vessels --> 
+    <constant name="AirMarginThickness" value="49*mm"/>    <!-- Space holder for air gap between cryostat vessels --> 
 
     <constant name="CryoBarrelFrontWarm" value="10*mm"/>   <!-- Al solid corresponding to 0.11 X0 -->
     <constant name="CryoBarrelFrontCold" value="3.8*mm"/>  <!-- Al solid equivalent of 0.043 X0 sandwich CFRP -->
diff --git a/Detector/DetFCCeeECalInclined/compact/FCCee_ECalBarrel_upstream.xml b/Detector/DetFCCeeECalInclined/compact/FCCee_ECalBarrel_upstream.xml
index e311407..17644a9 100644
--- a/Detector/DetFCCeeECalInclined/compact/FCCee_ECalBarrel_upstream.xml
+++ b/Detector/DetFCCeeECalInclined/compact/FCCee_ECalBarrel_upstream.xml
@@ -27,7 +27,7 @@
     <constant name="LArGapThickness" value="1.239749*2*mm"/>
 
     <!-- Air margin, thicknesses of cryostat and LAr bath -->
-    <constant name="AirMarginThickness" value="54*mm"/>    <!-- Space holder for air gap between cryostat vessels --> 
+    <constant name="AirMarginThickness" value="49*mm"/>    <!-- Space holder for air gap between cryostat vessels --> 
 
     <constant name="CryoBarrelFrontWarm" value="10*mm"/>   <!-- Al solid corresponding to 0.11 X0 -->
     <constant name="CryoBarrelFrontCold" value="3.8*mm"/>  <!-- Al solid equivalent of 0.043 X0 sandwich CFRP -->