diff --git a/DataSpec/SpecBase.cpp b/DataSpec/SpecBase.cpp
index 17054dead..cb6145873 100644
--- a/DataSpec/SpecBase.cpp
+++ b/DataSpec/SpecBase.cpp
@@ -33,8 +33,8 @@ static const hecl::SystemChar* MomErr[] =
 };
 
 constexpr uint32_t MomErrCount = std::extent<decltype(MomErr)>::value;
-SpecBase::SpecBase(hecl::Database::Project& project, bool pc)
-: m_project(project), m_pc(pc),
+SpecBase::SpecBase(const hecl::Database::DataSpecEntry* specEntry, hecl::Database::Project& project, bool pc)
+: hecl::Database::IDataSpec(specEntry), m_project(project), m_pc(pc),
   m_masterShader(project.getProjectWorkingPath(), ".hecl/RetroMasterShader.blend") {}
 
 bool SpecBase::canExtract(const ExtractPassInfo& info, std::vector<ExtractReport>& reps)
@@ -114,13 +114,13 @@ void SpecBase::doExtract(const ExtractPassInfo& info, FProgress progress)
     extractFromDisc(*m_disc, info.force, progress);
 }
 
-bool SpecBase::canCook(const hecl::ProjectPath& path)
+bool SpecBase::canCook(const hecl::ProjectPath& path, hecl::BlenderToken& btok)
 {
     if (!checkPathPrefix(path))
         return false;
     if (hecl::IsPathBlend(path))
     {
-        hecl::BlenderConnection& conn = hecl::BlenderConnection::SharedConnection();
+        hecl::BlenderConnection& conn = btok.getBlenderConnection();
         if (!conn.openBlend(path))
             return false;
         if (conn.getBlendType() != hecl::BlenderConnection::BlendType::None)
@@ -141,13 +141,14 @@ bool SpecBase::canCook(const hecl::ProjectPath& path)
 }
 
 const hecl::Database::DataSpecEntry* SpecBase::overrideDataSpec(const hecl::ProjectPath& path,
-                                                                const hecl::Database::DataSpecEntry* oldEntry)
+                                                                const hecl::Database::DataSpecEntry* oldEntry,
+                                                                hecl::BlenderToken& btok)
 {
     if (!checkPathPrefix(path))
         return nullptr;
     if (hecl::IsPathBlend(path))
     {
-        hecl::BlenderConnection& conn = hecl::BlenderConnection::SharedConnection();
+        hecl::BlenderConnection& conn = btok.getBlenderConnection();
         if (!conn.openBlend(path))
         {
             Log.report(logvisor::Error, _S("unable to cook '%s'"),
@@ -167,12 +168,12 @@ const hecl::Database::DataSpecEntry* SpecBase::overrideDataSpec(const hecl::Proj
 }
 
 void SpecBase::doCook(const hecl::ProjectPath& path, const hecl::ProjectPath& cookedPath,
-                      bool fast, FCookProgress progress)
+                      bool fast, hecl::BlenderToken& btok, FCookProgress progress)
 {
     DataSpec::g_curSpec = this;
     if (hecl::IsPathBlend(path))
     {
-        hecl::BlenderConnection& conn = hecl::BlenderConnection::SharedConnection();
+        hecl::BlenderConnection& conn = btok.getBlenderConnection();
         if (!conn.openBlend(path))
             return;
         switch (conn.getBlendType())
diff --git a/DataSpec/SpecBase.hpp b/DataSpec/SpecBase.hpp
index 11cb8e5c1..52136c254 100644
--- a/DataSpec/SpecBase.hpp
+++ b/DataSpec/SpecBase.hpp
@@ -16,11 +16,12 @@ struct SpecBase : hecl::Database::IDataSpec
     bool canExtract(const ExtractPassInfo& info, std::vector<ExtractReport>& reps);
     void doExtract(const ExtractPassInfo& info, FProgress progress);
 
-    bool canCook(const hecl::ProjectPath& path);
+    bool canCook(const hecl::ProjectPath& path, hecl::BlenderToken& btok);
     const hecl::Database::DataSpecEntry* overrideDataSpec(const hecl::ProjectPath& path,
-                                                          const hecl::Database::DataSpecEntry* oldEntry);
+                                                          const hecl::Database::DataSpecEntry* oldEntry,
+                                                          hecl::BlenderToken& btok);
     void doCook(const hecl::ProjectPath& path, const hecl::ProjectPath& cookedPath,
-                bool fast, FCookProgress progress);
+                bool fast, hecl::BlenderToken& btok, FCookProgress progress);
 
     bool canPackage(const PackagePassInfo& info);
     void gatherDependencies(const PackagePassInfo& info,
@@ -72,7 +73,7 @@ struct SpecBase : hecl::Database::IDataSpec
     /* Project accessor */
     hecl::Database::Project& getProject() const {return m_project;}
 
-    SpecBase(hecl::Database::Project& project, bool pc);
+    SpecBase(const hecl::Database::DataSpecEntry* specEntry, hecl::Database::Project& project, bool pc);
 protected:
     hecl::Database::Project& m_project;
     bool m_pc;
diff --git a/DataSpec/SpecMP1.cpp b/DataSpec/SpecMP1.cpp
index 8d07f39ea..a1d787ad3 100644
--- a/DataSpec/SpecMP1.cpp
+++ b/DataSpec/SpecMP1.cpp
@@ -34,8 +34,8 @@ struct SpecMP1 : SpecBase
     hecl::ProjectPath m_cookPath;
     PAKRouter<DNAMP1::PAKBridge> m_pakRouter;
 
-    SpecMP1(hecl::Database::Project& project, bool pc)
-    : SpecBase(project, pc),
+    SpecMP1(const hecl::Database::DataSpecEntry* specEntry, hecl::Database::Project& project, bool pc)
+    : SpecBase(specEntry, project, pc),
       m_workPath(project.getProjectWorkingPath(), _S("MP1")),
       m_cookPath(project.getProjectCookedPath(SpecEntMP1), _S("MP1")),
       m_pakRouter(*this, m_workPath, m_cookPath) {}
@@ -356,7 +356,7 @@ hecl::Database::DataSpecEntry SpecEntMP1 =
     _S("MP1"),
     _S("Data specification for original Metroid Prime engine"),
     [](hecl::Database::Project& project, hecl::Database::DataSpecTool)
-    -> hecl::Database::IDataSpec* {return new struct SpecMP1(project, false);}
+    -> hecl::Database::IDataSpec* {return new struct SpecMP1(&SpecEntMP1, project, false);}
 };
 
 hecl::Database::DataSpecEntry SpecEntMP1PC =
@@ -367,7 +367,7 @@ hecl::Database::DataSpecEntry SpecEntMP1PC =
     -> hecl::Database::IDataSpec*
     {
         if (tool != hecl::Database::DataSpecTool::Extract)
-            return new struct SpecMP1(project, true);
+            return new struct SpecMP1(&SpecEntMP1PC, project, true);
         return nullptr;
     }
 };
diff --git a/DataSpec/SpecMP2.cpp b/DataSpec/SpecMP2.cpp
index 0c28220aa..9b3836ff5 100644
--- a/DataSpec/SpecMP2.cpp
+++ b/DataSpec/SpecMP2.cpp
@@ -29,8 +29,8 @@ struct SpecMP2 : SpecBase
     hecl::ProjectPath m_cookPath;
     PAKRouter<DNAMP2::PAKBridge> m_pakRouter;
 
-    SpecMP2(hecl::Database::Project& project, bool pc)
-    : SpecBase(project, pc),
+    SpecMP2(const hecl::Database::DataSpecEntry* specEntry, hecl::Database::Project& project, bool pc)
+    : SpecBase(specEntry, project, pc),
       m_workPath(project.getProjectWorkingPath(), _S("MP2")),
       m_cookPath(project.getProjectCookedPath(SpecEntMP2), _S("MP2")),
       m_pakRouter(*this, m_workPath, m_cookPath) {}
@@ -307,7 +307,7 @@ hecl::Database::DataSpecEntry SpecEntMP2
     _S("MP2"),
     _S("Data specification for original Metroid Prime 2 engine"),
     [](hecl::Database::Project& project, hecl::Database::DataSpecTool)
-    -> hecl::Database::IDataSpec* {return new struct SpecMP2(project, false);}
+    -> hecl::Database::IDataSpec* {return new struct SpecMP2(&SpecEntMP2, project, false);}
 );
 
 hecl::Database::DataSpecEntry SpecEntMP2PC =
@@ -318,7 +318,7 @@ hecl::Database::DataSpecEntry SpecEntMP2PC =
     -> hecl::Database::IDataSpec*
     {
         if (tool != hecl::Database::DataSpecTool::Extract)
-            return new struct SpecMP2(project, true);
+            return new struct SpecMP2(&SpecEntMP2PC, project, true);
         return nullptr;
     }
 };
diff --git a/DataSpec/SpecMP3.cpp b/DataSpec/SpecMP3.cpp
index 02f318d17..c2c5b4a48 100644
--- a/DataSpec/SpecMP3.cpp
+++ b/DataSpec/SpecMP3.cpp
@@ -42,8 +42,8 @@ struct SpecMP3 : SpecBase
     hecl::ProjectPath m_feCookPath;
     PAKRouter<DNAMP3::PAKBridge> m_fePakRouter;
 
-    SpecMP3(hecl::Database::Project& project, bool pc)
-    : SpecBase(project, pc),
+    SpecMP3(const hecl::Database::DataSpecEntry* specEntry, hecl::Database::Project& project, bool pc)
+    : SpecBase(specEntry, project, pc),
       m_workPath(project.getProjectWorkingPath(), _S("MP3")),
       m_cookPath(project.getProjectCookedPath(SpecEntMP3), _S("MP3")),
       m_pakRouter(*this, m_workPath, m_cookPath),
@@ -491,7 +491,7 @@ hecl::Database::DataSpecEntry SpecEntMP3
     _S("MP3"),
     _S("Data specification for original Metroid Prime 3 engine"),
     [](hecl::Database::Project& project, hecl::Database::DataSpecTool)
-    -> hecl::Database::IDataSpec* {return new struct SpecMP3(project, false);}
+    -> hecl::Database::IDataSpec* {return new struct SpecMP3(&SpecEntMP3, project, false);}
 );
 
 hecl::Database::DataSpecEntry SpecEntMP3PC =
@@ -502,7 +502,7 @@ hecl::Database::DataSpecEntry SpecEntMP3PC =
     -> hecl::Database::IDataSpec*
     {
         if (tool != hecl::Database::DataSpecTool::Extract)
-            return new struct SpecMP3(project, true);
+            return new struct SpecMP3(&SpecEntMP3PC, project, true);
         return nullptr;
     }
 };
diff --git a/Editor/ProjectResourceFactoryBase.cpp b/Editor/ProjectResourceFactoryBase.cpp
index 381d64663..5fc6988b9 100644
--- a/Editor/ProjectResourceFactoryBase.cpp
+++ b/Editor/ProjectResourceFactoryBase.cpp
@@ -244,12 +244,9 @@ void ProjectResourceFactoryBase::BackgroundIndexProc()
 
 void ProjectResourceFactoryBase::CancelBackgroundIndex()
 {
-    if (m_backgroundRunning)
-    {
-        m_backgroundRunning = false;
-        if (m_backgroundIndexTh.joinable())
-            m_backgroundIndexTh.join();
-    }
+    m_backgroundRunning = false;
+    if (m_backgroundIndexTh.joinable())
+        m_backgroundIndexTh.join();
 }
 
 void ProjectResourceFactoryBase::BeginBackgroundIndex
@@ -273,7 +270,7 @@ hecl::ProjectPath ProjectResourceFactoryBase::GetCookedPath(const hecl::ProjectP
 {
     const hecl::Database::DataSpecEntry* spec = m_origSpec;
     if (pcTarget)
-        spec = m_cookSpec->overrideDataSpec(working, m_pcSpec);
+        spec = m_cookSpec->overrideDataSpec(working, m_pcSpec, hecl::SharedBlenderToken);
     if (!spec)
         return {};
     return working.getCookedPath(*spec);
@@ -281,7 +278,7 @@ hecl::ProjectPath ProjectResourceFactoryBase::GetCookedPath(const hecl::ProjectP
 
 bool ProjectResourceFactoryBase::SyncCook(const hecl::ProjectPath& working)
 {
-    return m_clientProc.syncCook(working) == 0;
+    return m_clientProc.syncCook(working, m_cookSpec.get(), hecl::SharedBlenderToken);
 }
 
 CFactoryFnReturn ProjectResourceFactoryBase::SyncMakeObject(const SObjectTag& tag,
@@ -348,7 +345,7 @@ void ProjectResourceFactoryBase::AsyncTask::EnsurePath(const hecl::ProjectPath&
             m_cookedPath.getModtime() < path.getModtime())
         {
             /* Start a background cook here */
-            m_cookTransaction = m_parent.m_clientProc.addCookTransaction(path);
+            m_cookTransaction = m_parent.m_clientProc.addCookTransaction(path, m_parent.m_cookSpec.get());
             return;
         }
 
diff --git a/Editor/ProjectResourceFactoryBase.hpp b/Editor/ProjectResourceFactoryBase.hpp
index 033750f79..a18a748ac 100644
--- a/Editor/ProjectResourceFactoryBase.hpp
+++ b/Editor/ProjectResourceFactoryBase.hpp
@@ -95,6 +95,8 @@ public:
 
     void AsyncIdle();
     void Shutdown() {CancelBackgroundIndex();}
+
+    ~ProjectResourceFactoryBase() {Shutdown();}
 };
 
 }
diff --git a/Runtime/IFactory.hpp b/Runtime/IFactory.hpp
index 10006a064..bf667a154 100644
--- a/Runtime/IFactory.hpp
+++ b/Runtime/IFactory.hpp
@@ -12,7 +12,7 @@ class IObj;
 class IFactory
 {
 public:
-    virtual ~IFactory() {}
+    virtual ~IFactory() = default;
     virtual std::unique_ptr<IObj> Build(const SObjectTag&, const CVParamTransfer&)=0;
     virtual void BuildAsync(const SObjectTag&, const CVParamTransfer&, IObj**)=0;
     virtual void CancelBuild(const SObjectTag&)=0;
diff --git a/hecl b/hecl
index 1a1b41c6c..fe207bf42 160000
--- a/hecl
+++ b/hecl
@@ -1 +1 @@
-Subproject commit 1a1b41c6c491322427927939beb69a45d56b8bac
+Subproject commit fe207bf42c08164a83420e8ed82ad7f009972307