diff --git a/FCCee/ALLEGRO/compact/ALLEGRO_o1_v03/ALLEGRO_o1_v03.xml b/FCCee/ALLEGRO/compact/ALLEGRO_o1_v03/ALLEGRO_o1_v03.xml
index 8d45301eb..2e59888ff 100644
--- a/FCCee/ALLEGRO/compact/ALLEGRO_o1_v03/ALLEGRO_o1_v03.xml
+++ b/FCCee/ALLEGRO/compact/ALLEGRO_o1_v03/ALLEGRO_o1_v03.xml
@@ -26,6 +26,12 @@
     <constant name="world_x" value="world_size"/>
     <constant name="world_y" value="world_size"/>
     <constant name="world_z" value="world_size"/>
+    
+    <constant name="QC1_rmin" value="42/2*mm"/>
+    <constant name="QC1_rmax" value="64/2*mm"/>
+    <constant name="QC1L1_len" value="700*mm"/>
+    <constant name="QC1L1_start" value="2200*mm"/>
+    <constant name="screenstart" value="-10*mm"/>
   </define>
 
   <include ref="./DectDimensions.xml" />
diff --git a/FCCee/ALLEGRO/compact/ALLEGRO_o1_v03/DectDimensions.xml b/FCCee/ALLEGRO/compact/ALLEGRO_o1_v03/DectDimensions.xml
index 237223204..ab117783d 100644
--- a/FCCee/ALLEGRO/compact/ALLEGRO_o1_v03/DectDimensions.xml
+++ b/FCCee/ALLEGRO/compact/ALLEGRO_o1_v03/DectDimensions.xml
@@ -186,6 +186,12 @@
     <constant name="tracker_region_zmax" value="OuterTracker_half_length"/>
     <constant name="tracker_region_rmax" value="OuterTracker_outer_radius"/>
 
+    <constant name="Solenoid_inner_radius" value="2100*mm"/>
+    <constant name="Solenoid_outer_radius" value="2400*mm"/>
+    <constant name="Solenoid_half_length" value="2500*mm"/>
+    <constant name="Solenoid_Coil_half_length" value="Solenoid_half_length-200*mm"/>
+    <constant name="Solenoid_Coil_radius" value="Solenoid_inner_radius+200*mm"/>
+    
     <constant name="GlobalTrackerReadoutID" type="string" value="system:5,side:-2,layer:6,module:11,sensor:8"/>
   </define>