diff --git a/Stars Assistant/Services/FleetManager.cs b/Stars Assistant/Services/FleetManager.cs
index 6100d34..946b7dc 100644
--- a/Stars Assistant/Services/FleetManager.cs	
+++ b/Stars Assistant/Services/FleetManager.cs	
@@ -36,6 +36,7 @@ public class FleetManager : IEnableLogger
 
         public override string ToString() => $"To {Destination}: {TotalIronium}I/{TotalBoranium}B/{TotalGermanium}G/{TotalColonists}C";
     }
+
     private IObservable<IChangeSet<FleetSummary>>? _fleetSummaries;
 
     private ReadOnlyObservableCollection<FleetSummary>? summaries;
@@ -59,26 +60,15 @@ public class FleetManager : IEnableLogger
                     TotalGermanium = group.List.Items.Sum(f => f.Germanium),
                     TotalColonists = group.List.Items.Sum(f => f.Colonists)
                 })
-            // .Transform(group => 
-            //     group.List.Connect()
-            //     .QueryWhenChanged(query => 
-            //     {
-            //         var iro = query.Sum(f => f.Ironium);
-            //         var bor = query.Sum(f => f.Boranium);
-            //         var ger = query.Sum(f => f.Germanium);
-            //         var col = query.Sum(f => f.Colonists);
-            //         return new FleetSummary 
-            //         {
-            //             Destination = group.GroupKey,
-            //             TotalIronium = iro,
-            //             TotalBoranium = bor,
-            //             TotalGermanium = ger,
-            //             TotalColonists = col
-            //         };
-            //     })                    
-            // )
         ;
+
+        // Demo only
+        var sourceCache = new SourceCache<FleetSummary, string>(fs => fs.Destination);
+        var tmp = _fleetSummaries
+            .AddKey(fs => fs.Destination)
+            .PopulateInto(sourceCache);
         
+
         _fleetSummaries
             .ObserveOn(RxApp.MainThreadScheduler)
             .Bind(out summaries)