diff --git a/CHANGELOG.md b/CHANGELOG.md
index fb08969ab1..859f5d9afc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,8 +4,9 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [8.4.1] - Unreleased
+## [8.4.1] - 2024-12-10
 
+- Improve Overview Model Generation Speed
 - Add Remote Table Without DB Creation Attacher
 
 ## [8.4.0] - 2024-12-02
diff --git a/Directory.Packages.props b/Directory.Packages.props
index c299a0cbb7..8a952632cc 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -11,6 +11,7 @@
     <PackageVersion Include="HIC.SynthEHR" Version="2.0.1" />
     <PackageVersion Include="HIC.FAnsiSql" Version="3.2.7" />
     <PackageVersion Include="LibArchive.Net" Version="0.1.5" />
+    <PackageVersion Include="Microsoft.Bcl.AsyncInterfaces" Version="9.0.0" />
     <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="8.0.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
diff --git a/Documentation/CodeTutorials/Packages.md b/Documentation/CodeTutorials/Packages.md
index 48521778e1..f6d9aad516 100644
--- a/Documentation/CodeTutorials/Packages.md
+++ b/Documentation/CodeTutorials/Packages.md
@@ -42,4 +42,5 @@
 | AWSSDK.SecurityToken | [GitHub](https://github.com/aws/aws-sdk-net) | [Apache 2.0](https://opensource.org/licenses/Apache-2.0)  | |
 | AWSSDK.SSO | [GitHub](https://github.com/aws/aws-sdk-net) | [Apache 2.0](https://opensource.org/licenses/Apache-2.0)  | |
 | AWSSDK.SSOOIDC | [GitHub](https://github.com/aws/aws-sdk-net) | [Apache 2.0](https://opensource.org/licenses/Apache-2.0)  | |
+| Microsoft.Bcl.AsyncInterfaces | [Nuget](https://www.nuget.org/packages/microsoft.bcl.asyncinterfaces/) | [MIT](https://opensource.org/licenses/MIT)  | |
 [DBMS]: ./Glossary.md#DBMS
diff --git a/Rdmp.Core/Curation/Data/Overview/OverviewModel.cs b/Rdmp.Core/Curation/Data/Overview/OverviewModel.cs
index a058df3cf8..609e8384b0 100644
--- a/Rdmp.Core/Curation/Data/Overview/OverviewModel.cs
+++ b/Rdmp.Core/Curation/Data/Overview/OverviewModel.cs
@@ -69,7 +69,7 @@ public void Regen(string whereClause)
         dt.EndLoadData();
         con.Dispose();
         _numberOfRecords = dt.Rows.Count;
-        _numberOfPeople = hasExtractionIdentifier ? dt.DefaultView.ToTable(true, column.ColumnInfo.GetRuntimeName()).Rows.Count : 0;
+        _numberOfPeople = hasExtractionIdentifier?dt.AsEnumerable().Select(r => r[column.ColumnInfo.GetRuntimeName()]).ToList().Distinct().Count():0;
         GetDataLoads();
         dt.Dispose();
     }
diff --git a/Rdmp.Core/Rdmp.Core.csproj b/Rdmp.Core/Rdmp.Core.csproj
index 2de063bb79..44696b6cff 100644
--- a/Rdmp.Core/Rdmp.Core.csproj
+++ b/Rdmp.Core/Rdmp.Core.csproj
@@ -327,6 +327,7 @@
 		<PackageReference Include="HIC.SynthEHR" />
 		<PackageReference Include="HIC.FAnsiSql" />
 		<PackageReference Include="LibArchive.Net" />
+		<PackageReference Include="Microsoft.Bcl.AsyncInterfaces" />
 		<PackageReference Include="Microsoft.SourceLink.GitHub">
 			<PrivateAssets>all</PrivateAssets>
 			<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
diff --git a/Rdmp.UI/CommandExecution/Proposals/ProposeExecutionWhenTargetIsCatalogue.cs b/Rdmp.UI/CommandExecution/Proposals/ProposeExecutionWhenTargetIsCatalogue.cs
index 12a80d2f32..9b2a9a3a6d 100644
--- a/Rdmp.UI/CommandExecution/Proposals/ProposeExecutionWhenTargetIsCatalogue.cs
+++ b/Rdmp.UI/CommandExecution/Proposals/ProposeExecutionWhenTargetIsCatalogue.cs
@@ -10,6 +10,7 @@
 using Rdmp.Core.CommandExecution.Combining;
 using Rdmp.Core.Curation.Data;
 using Rdmp.UI.ItemActivation;
+using Rdmp.UI.MainFormUITabs;
 using Rdmp.UI.Overview;
 
 namespace Rdmp.UI.CommandExecution.Proposals;
@@ -24,7 +25,7 @@ public ProposeExecutionWhenTargetIsCatalogue(IActivateItems itemActivator) : bas
 
     public override void Activate(Catalogue c)
     {
-        ItemActivator.Activate<ViewCatalogueOverviewUI, Catalogue>(c);
+        ItemActivator.Activate<CatalogueUI, Catalogue>(c);
     }
 
     public override ICommandExecution ProposeExecution(ICombineToMakeCommand cmd, Catalogue targetCatalogue,
diff --git a/SharedAssemblyInfo.cs b/SharedAssemblyInfo.cs
index a672341220..ec5884a345 100644
--- a/SharedAssemblyInfo.cs
+++ b/SharedAssemblyInfo.cs
@@ -10,6 +10,6 @@
 [assembly: AssemblyTrademark("")]
 [assembly: AssemblyCulture("")]
 
-[assembly: AssemblyVersion("8.4.0")]
-[assembly: AssemblyFileVersion("8.4.0")]
-[assembly: AssemblyInformationalVersion("8.4.0")]
+[assembly: AssemblyVersion("8.4.1")]
+[assembly: AssemblyFileVersion("8.4.1")]
+[assembly: AssemblyInformationalVersion("8.4.1")]
diff --git a/rdmp-client.xml b/rdmp-client.xml
index b8ebc0e723..9157566cec 100644
--- a/rdmp-client.xml
+++ b/rdmp-client.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <item>
-    <version>8.4.0.0</version>
-    <url>https://github.com/HicServices/RDMP/releases/download/v8.4.0/rdmp-8.4.0-client.zip</url>
+    <version>8.4.1.0</version>
+    <url>https://github.com/HicServices/RDMP/releases/download/v8.4.1/rdmp-8.4.1-client.zip</url>
     <changelog>https://github.com/HicServices/RDMP/blob/main/CHANGELOG.md#7</changelog>
     <mandatory>true</mandatory>
 </item>