diff --git a/source/AStack.cpp b/source/AStack.cpp
index f8a3a7e..bb6ea46 100644
--- a/source/AStack.cpp
+++ b/source/AStack.cpp
@@ -12,15 +12,17 @@
  */
 
 #include "AStack.hpp"
+#include "StackCreator.hpp"
 #include <cassert>
 
 using namespace std;
 
-AStack::AStack(const std::string &dir, StackType type, const std::string &name)
+const char *AStack::stackTypeStrings[NUM_STACKTYPES] = {"None", "Deep", "Rnn"};
+
+AStack::AStack(StackType type, const std::string &name)
 : m_name(name)
 , m_type(type)
 , m_pLayers(nullptr)
-, m_dir(dir)
 {
 }
 
@@ -39,6 +41,39 @@ AStack::~AStack()
 	}
 }
 
+AStack::AStack(StackType type, const std::string &name, Json::Value& layers, LayerConstructor* pLayerConstructor)
+: m_type(type)
+, m_name(name)
+, m_pLayers(nullptr)
+{
+	for (int i=0; i < layers.size(); i++)
+	{
+		Json::Value &layer = layers[i];
+		
+		string layername = layer["name"].asString();
+		int numVisibleX = layer["numVisibleX"].asInt();
+		int numVisibleY = layer["numVisibleY"].asInt();
+		int numHidden = layer["numHidden"].asInt();
+		int numContext = layer["numContext"].asInt();
+		
+		Layer *pLayer = nullptr;
+		if (!pLayerConstructor)
+		{
+			pLayer = new Layer(layername, i, numVisibleX, numVisibleY, numHidden, numContext);
+		}
+		else
+		{
+			pLayer = pLayerConstructor->onConstruct(this, layername, i, numVisibleX, numVisibleY, numHidden, numContext);
+		}
+		
+		assert(pLayer != nullptr);
+		
+		pLayer->fromJson(layer["rbm"]);
+		addLayer(pLayer);
+	}
+
+}
+
 AStack::StackType AStack::type()
 {
 	return m_type;
@@ -100,68 +135,9 @@ Layer* AStack::getLayer(size_t layerId) const
 	
 }
 
-bool AStack::load(LayerConstructor *pLayerConstructor)
+bool AStack::save(const std::string &dir)
 {
-	std::cout << "Importing Project " << m_name << std::endl;
-	ifstream ifs(m_dir + "/" + m_name + string(".prj"));
-	
-	Json::Value project;
-	ifs >> project;
-	
-	const string &name = project["stack"]["name"].asString();
-	Json::Value &layers = project["stack"]["layers"];
-			
-	for (int i=0; i < layers.size(); i++)
-	{
-		Json::Value &layer = layers[i];
-		
-		string layername = layer["name"].asString();
-		int numVisibleX = layer["numVisibleX"].asInt();
-		int numVisibleY = layer["numVisibleY"].asInt();
-		int numHidden = layer["numHidden"].asInt();
-		int numContext = layer["numContext"].asInt();
-		
-		Layer *pLayer = nullptr;
-		if (!pLayerConstructor)
-		{
-			pLayer = new Layer(layername, i, numVisibleX, numVisibleY, numHidden, numContext);
-		}
-		else
-		{
-			pLayer = pLayerConstructor->onConstruct(layername, i, numVisibleX, numVisibleY, numHidden, numContext);
-		}
-		
-		assert(pLayer != nullptr);
-		
-		pLayer->fromJson(layer["rbm"]);
-		addLayer(pLayer);
-	}
-	
-	return true;
-}
-
-bool AStack::save()
-{
-	std::cout << "Exporting Project " << m_name << std::endl;
-	ofstream ofs(m_dir + "/" + m_name + string(".prj"));
-	
-	Json::Value project;
-	project["stack"]["name"] = m_name;
-	project["stack"]["type_string"] = stackTypeStrings[m_type];
-	project["stack"]["type"] = m_type;
-	
-	Json::Value layers(Json::arrayValue);
-	Layer *pLayer = m_pLayers;
-	while(pLayer)
-	{
-		layers.append(pLayer->toJson());
-		pLayer = pLayer->next;
-	}
-	project["stack"]["layers"] = layers;
-	
-	ofs << project;
-	
-	return true;
+	return StackCreator::toFile(this, dir, m_name);
 }
 
 void AStack::weightsInit(double stddev)
@@ -174,12 +150,12 @@ void AStack::weightsInit(double stddev)
 	}
 }
 
-bool AStack::loadWeights()
+bool AStack::loadWeights(const std::string &dir)
 {
 	Layer *pLayer = m_pLayers;
 	while(pLayer)
 	{
-		if (!pLayer->weightsLoad(m_dir, m_name))
+		if (!pLayer->weightsLoad(dir, m_name))
 		{
 			return false;
 		}
@@ -188,12 +164,12 @@ bool AStack::loadWeights()
 	return true;
 }
 
-bool AStack::saveWeights()
+bool AStack::saveWeights(const std::string &dir)
 {
 	Layer *pLayer = m_pLayers;
 	while(pLayer)
 	{
-		if (!pLayer->weightsSave(m_dir, m_name))
+		if (!pLayer->weightsSave(dir, m_name))
 		{
 			return false;
 		}
diff --git a/source/AStack.hpp b/source/AStack.hpp
index d31cc9c..80815b2 100644
--- a/source/AStack.hpp
+++ b/source/AStack.hpp
@@ -21,13 +21,14 @@
 #include "Layer.hpp"
 #include <forward_list>
 
+class AStack;
 class LayerConstructor
 {
 public:
 	LayerConstructor() {}
 	virtual ~LayerConstructor() {}
 	
-	virtual Layer* onConstruct(const std::string &name, size_t id, size_t numVisibleX, size_t numVisibleY, size_t numHidden, size_t numContext)
+	virtual Layer* onConstruct(AStack *pStack, const std::string &name, size_t id, size_t numVisibleX, size_t numVisibleY, size_t numHidden, size_t numContext)
 	{
 		return nullptr;
 	}
@@ -44,9 +45,10 @@ public:
 		NUM_STACKTYPES
 	};
 
-	const char *stackTypeStrings[NUM_STACKTYPES] = {"None", "Deep", "Rnn"};
+	static const char *stackTypeStrings[NUM_STACKTYPES];
 	
-	AStack(const std::string &dir, StackType type, const std::string &name);
+	AStack(StackType type, const std::string &name);
+	AStack(StackType type, const std::string &name, Json::Value &layers, LayerConstructor *pLayerConstructor=nullptr);
 	AStack(const AStack& orig);
 	virtual ~AStack();
 	
@@ -58,12 +60,11 @@ public:
 	
 	Layer* getLayer(size_t layerId) const;
 
-	bool load(LayerConstructor *pLayerConstructor=nullptr);
-	bool save();
+	bool save(const std::string &dir);
 
 	void weightsInit(double stddev);
-	bool loadWeights();
-	bool saveWeights();
+	bool loadWeights(const std::string &dir);
+	bool saveWeights(const std::string &dir);
 
 	virtual void train(size_t layerId, const arma::mat& batch, Rbm::IListener* pListener) = 0;
 	virtual void train(const arma::mat& batch, Rbm::IListener* pListener) = 0;
@@ -73,7 +74,6 @@ protected:
 	StackType m_type;
 	std::string m_name;
 	Layer *m_pLayers;
-	std::string m_dir;
 
 private:
 	
diff --git a/source/DeepStack.cpp b/source/DeepStack.cpp
index aea2f83..602ee75 100644
--- a/source/DeepStack.cpp
+++ b/source/DeepStack.cpp
@@ -15,14 +15,15 @@
 
 using namespace std;
 
-DeepStack::DeepStack(const std::string &dir, const std::string &name, StackType type)
-: AStack(dir, type, name)
+DeepStack::DeepStack(const std::string &name)
+: AStack(StackType::Deep, name)
 {
 }
 
-DeepStack::DeepStack(const DeepStack& orig)
-: AStack(orig)
+DeepStack::DeepStack(const std::string &name, Json::Value& layers, LayerConstructor* pLayerConstructor)
+: AStack(StackType::Deep, name, layers, pLayerConstructor)
 {
+
 }
 
 DeepStack::~DeepStack()
@@ -62,10 +63,10 @@ arma::mat& DeepStack::trainingBatch()
 	return m_trainingBatch;
 }
 
-size_t DeepStack::loadTrainingBatch(bool doNormalize)
+size_t DeepStack::loadTrainingBatch(const std::string &dir, bool doNormalize)
 {
-	std::string filename = m_dir + "/" + m_name + ".training.dat";
-	std::string path = m_dir + "/" + m_name + ".training.dat";
+	std::string filename = dir + "/" + m_name + ".training.dat";
+	std::string path = dir + "/" + m_name + ".training.dat";
 	bool success = m_trainingBatch.load(filename, arma::arma_ascii);
 
 	if (success)
@@ -95,9 +96,9 @@ size_t DeepStack::loadTrainingBatch(bool doNormalize)
 	return m_trainingBatch.n_rows;
 }
 
-size_t DeepStack::saveTrainingBatch()
+size_t DeepStack::saveTrainingBatch(const std::string &dir)
 {
-	std::string filename = m_dir + "/" + m_name + ".training.dat";
+	std::string filename = dir + "/" + m_name + ".training.dat";
 	bool success = m_trainingBatch.save(filename, arma::arma_ascii);
 
 	if (success)
diff --git a/source/DeepStack.hpp b/source/DeepStack.hpp
index bcb425a..af15f26 100644
--- a/source/DeepStack.hpp
+++ b/source/DeepStack.hpp
@@ -24,8 +24,9 @@
 class DeepStack : public AStack
 {
 public:
-	DeepStack(const std::string &dir, const std::string &name, StackType type=StackType::None);
-	DeepStack(const DeepStack& orig);
+	DeepStack(const std::string &name);
+	DeepStack(const std::string &name, Json::Value &layers, LayerConstructor *pLayerConstructor=nullptr);
+	DeepStack(const DeepStack& orig) = delete;
 	virtual ~DeepStack();
 	
 	void train(const arma::mat& batch, Rbm::IListener* pListener) override;
@@ -38,8 +39,8 @@ public:
 	size_t numTraining();
 	void addTraining(const arma::mat &toAdd);
 	void delTraining(int index);
-	size_t loadTrainingBatch(bool doNormalize=false);
-	size_t saveTrainingBatch();
+	size_t loadTrainingBatch(const std::string &dir, bool doNormalize=false);
+	size_t saveTrainingBatch(const std::string &dir);
 	arma::mat& trainingBatch();
 
 private:
diff --git a/source/MainComponent.cpp b/source/MainComponent.cpp
index 80a7db5..85b108d 100644
--- a/source/MainComponent.cpp
+++ b/source/MainComponent.cpp
@@ -24,6 +24,7 @@
 #include <sys/types.h>
 #include <pwd.h>
 #include "MainComponent.hpp"
+#include "StackCreator.hpp"
 
 
 //[MiscUserDefs] You can add your own user definitions and misc code here...
@@ -47,6 +48,7 @@ MainComponent::MainComponent (const String prjname)
 , m_weightIndex(0)
 , m_toolTipWindow(this)
 , m_file(prjname)
+, m_dir(".")
 {
     addAndMakeVisible (trainButton = new TextButton ("Train button"));
     trainButton->setTooltip (TRANS("Start/Stop training"));
@@ -557,7 +559,7 @@ void MainComponent::buttonClicked (Button* buttonThatWasClicked)
 		
 		if (!m_stack)
 		{
-			m_stack = new DeepStack(m_file.getParentDirectory().getFullPathName().toStdString(), std::string(projectNameLabel->getText().getCharPointer()));
+			m_stack = new DeepStack(std::string(projectNameLabel->getText().getCharPointer()));
 		}
 		Layer *pPrev = m_stack->getLayer(next_index-1);
 		if (pPrev)
@@ -565,7 +567,7 @@ void MainComponent::buttonClicked (Button* buttonThatWasClicked)
 			numVisX = pPrev->bh().n_elem;
 			numVisY = 1;
 		}
-		m_stack->addLayer(onConstruct("Layer", next_index, numVisX, numVisY, numHid, numCtx));
+		m_stack->addLayer(onConstruct(m_stack, "Layer", next_index, numVisX, numVisY, numHid, numCtx));
 		m_rbmSelect->addItem(String(next_index), next_index+1);
 		m_rbmSelect->setSelectedId(next_index+1, sendNotification);
         //[/UserButtonCode_createButton]
@@ -583,9 +585,10 @@ void MainComponent::buttonClicked (Button* buttonThatWasClicked)
 		{
 			m_file = fc->getResult();
 			projectNameLabel->setText(m_file.getFileNameWithoutExtension(), NotificationType::dontSendNotification);
-			m_stack = new DeepStack(m_file.getParentDirectory().getFullPathName().toStdString(), std::string(projectNameLabel->getText().getCharPointer()));
-			m_stack->load(this);
-			m_stack->loadWeights();
+			AStack *pStack = StackCreator::fromFile(m_file.getParentDirectory().getFullPathName().toStdString(), std::string(projectNameLabel->getText().getCharPointer()), this);
+			m_stack = reinterpret_cast<DeepStack*>(pStack);
+			//			m_stack->load(this);
+			m_stack->loadWeights(m_dir);
 			m_rbmSelect->clear(dontSendNotification);
 
 			for (int id=0; id < m_stack->numLayers(); id++)
@@ -880,9 +883,9 @@ void MainComponent::mouseWheelMove (const MouseEvent& e, const MouseWheelDetails
 //[MiscUserCode] You can add your own definitions of your custom methods or any other code here...
 void MainComponent::save ()
 {
-	m_stack->saveTrainingBatch();
-	m_stack->saveWeights();
-	m_stack->save();
+	m_stack->saveTrainingBatch(m_dir);
+	m_stack->saveWeights(m_dir);
+	m_stack->save(m_dir);
 }
 
 const juce::String& MainComponent::getBaseDir()
diff --git a/source/MainComponent.hpp b/source/MainComponent.hpp
index 0ffa95b..1bcd725 100644
--- a/source/MainComponent.hpp
+++ b/source/MainComponent.hpp
@@ -72,9 +72,10 @@ public:
     void mouseDoubleClick (const MouseEvent& e);
     void mouseWheelMove (const MouseEvent& e, const MouseWheelDetails& wheel);
 
-	Layer* onConstruct(const std::string &name, size_t id, size_t numVisibleX, size_t numVisibleY, size_t numHidden, size_t numContext)
+	Layer* onConstruct(AStack *pStack, const std::string &name, size_t id, size_t numVisibleX, size_t numVisibleY, size_t numHidden, size_t numContext)
 	{
-		RbmComponent *pComp = new RbmComponent(*m_stack, name, id, numVisibleX, numVisibleY, numHidden, numContext);
+		DeepStack &deepStack = reinterpret_cast<DeepStack&>(*pStack);
+		RbmComponent *pComp = new RbmComponent(deepStack, name, id, numVisibleX, numVisibleY, numHidden, numContext);
 		addAndMakeVisible(pComp);
 		return static_cast<Layer*>(pComp);
 	}
@@ -103,13 +104,13 @@ private:
 
 	void loadTraining()
 	{
-		m_stack->loadTrainingBatch(rbmNormalizeDataToggleButton->getToggleState());
+		m_stack->loadTrainingBatch(m_dir, rbmNormalizeDataToggleButton->getToggleState());
 		patterSlider->setRange(0, m_stack->numTraining()-1, 1);
 	}
 
 	void saveTraining()
 	{
-		m_stack->save();
+		m_stack->save(m_dir);
 	}
 
 	void addTraining(const arma::mat &training)
@@ -174,7 +175,7 @@ private:
     ScopedPointer<ToggleButton> rbmDoSampleBatch;
     ScopedPointer<Label> sizeMiniBatch;
     ScopedPointer<ToggleButton> rbmUseHiddenGaussianToggleButton;
-
+	std::string m_dir;
 
     //==============================================================================
     JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MainComponent)
diff --git a/source/RbmComponent.cpp b/source/RbmComponent.cpp
index b5c126b..b268d1e 100644
--- a/source/RbmComponent.cpp
+++ b/source/RbmComponent.cpp
@@ -23,9 +23,9 @@
 
 
 //==============================================================================
-RbmComponent::RbmComponent (AStack &stack, const std::string &name, size_t id, size_t numVisibleX, size_t numVisibleY, size_t numHidden, size_t numContext)
+RbmComponent::RbmComponent (DeepStack &stack, const std::string &name, size_t id, size_t numVisibleX, size_t numVisibleY, size_t numHidden, size_t numContext)
 	: Layer(name, id, numVisibleX, numVisibleY, numHidden, numContext)
-	, m_stack(dynamic_cast<DeepStack&>(stack))
+	, m_stack(stack)
 	, m_currWeightIndexToDraw(0)
 	, DrawVisibleTrain(nullptr)
 	, DrawVisibleReconst(nullptr)
diff --git a/source/RbmComponent.hpp b/source/RbmComponent.hpp
index 3a00d0b..e4e14d8 100644
--- a/source/RbmComponent.hpp
+++ b/source/RbmComponent.hpp
@@ -43,7 +43,7 @@ class RbmComponent	: public Component
 {
 public:
     //==============================================================================
-    RbmComponent (AStack &stack, const std::string &name, size_t id, size_t numVisibleX, size_t numVisibleY, size_t numHidden, size_t numContext);
+    RbmComponent (DeepStack &stack, const std::string &name, size_t id, size_t numVisibleX, size_t numVisibleY, size_t numHidden, size_t numContext);
     ~RbmComponent();
 
     //==============================================================================
diff --git a/source/RnnStack.cpp b/source/RnnStack.cpp
new file mode 100644
index 0000000..6bf4bdb
--- /dev/null
+++ b/source/RnnStack.cpp
@@ -0,0 +1,40 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+/* 
+ * File:   RnnStack.cpp
+ * Author: jens
+ * 
+ * Created on 17. Januar 2022, 12:43
+ */
+
+#include "RnnStack.hpp"
+
+RnnStack::RnnStack(const std::string &name)
+: AStack(StackType::Rnn, name)
+{
+}
+
+RnnStack::RnnStack(const std::string &name, Json::Value& layers, LayerConstructor* pLayerConstructor)
+: AStack(StackType::Rnn, name, layers, pLayerConstructor)
+{
+
+}
+
+RnnStack::~RnnStack()
+{
+}
+
+
+void RnnStack::train(const arma::mat& batch, Rbm::IListener* pListener)
+{
+
+}
+
+void RnnStack::train(size_t layerId, const arma::mat& batch, Rbm::IListener* pListener)
+{
+
+}
diff --git a/source/RnnStack.hpp b/source/RnnStack.hpp
new file mode 100644
index 0000000..6bdc7b5
--- /dev/null
+++ b/source/RnnStack.hpp
@@ -0,0 +1,36 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+/* 
+ * File:   RnnStack.hpp
+ * Author: jens
+ *
+ * Created on 17. Januar 2022, 12:43
+ */
+
+#ifndef RNNSTACK_HPP
+#define RNNSTACK_HPP
+
+#include "AStack.hpp"
+
+class RnnStack : public AStack
+{
+public:
+	RnnStack(const std::string &name);
+	RnnStack(const std::string &name, Json::Value &layers, LayerConstructor *pLayerConstructor=nullptr);
+	RnnStack(const RnnStack& orig) = delete;
+	virtual ~RnnStack();
+
+	void train(const arma::mat& batch, Rbm::IListener* pListener) override;
+	void train(size_t layerId, const arma::mat& batch, Rbm::IListener* pListener) override;
+	
+
+private:
+
+};
+
+#endif /* RNNSTACK_HPP */
+
diff --git a/source/StackCreator.cpp b/source/StackCreator.cpp
new file mode 100644
index 0000000..a23e2d9
--- /dev/null
+++ b/source/StackCreator.cpp
@@ -0,0 +1,86 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+/* 
+ * File:   StackCreator.cpp
+ * Author: jens
+ * 
+ * Created on 17. Januar 2022, 18:04
+ */
+
+#include "StackCreator.hpp"
+#include "DeepStack.hpp"
+#include "RnnStack.hpp"
+
+#include <string>
+#include <cassert>
+
+using namespace std;
+
+StackCreator::StackCreator()
+{
+}
+
+StackCreator::~StackCreator()
+{
+}
+
+AStack* StackCreator::fromJson(Json::Value& project, LayerConstructor *pLayerConstructor)
+{
+	const string &name = project["stack"]["name"].asString();
+	Json::Value &stack = project["stack"];
+	Json::Value &layers = project["stack"]["layers"];
+	int type = stack["type"].asInt();
+			
+	if (type == AStack::StackType::Deep)
+	{
+		return new DeepStack(name, layers, pLayerConstructor);
+	}
+	
+	if (type == AStack::StackType::Rnn)
+	{
+		return new RnnStack(name, layers, pLayerConstructor);
+	}
+	
+	return new DeepStack(name, layers, pLayerConstructor);
+
+}
+
+AStack* StackCreator::fromFile(const std::string &dir, const std::string &name, LayerConstructor *pLayerConstructor)
+{
+	std::cout << "Importing Project " << name << std::endl;
+	ifstream ifs(dir + "/" + name + string(".prj"));
+	
+	Json::Value project;
+	ifs >> project;
+
+	return fromJson(project, pLayerConstructor);
+}
+
+bool StackCreator::toFile(AStack* pStack, const std::string& dir, const std::string& name)
+{
+	std::cout << "Exporting Project " << name << std::endl;
+	ofstream ofs(dir + "/" + name + string(".prj"));
+	
+	Json::Value project;
+	project["stack"]["name"] = name;
+	project["stack"]["type_string"] = AStack::stackTypeStrings[pStack->type()];
+	project["stack"]["type"] = pStack->type();
+	
+	Json::Value layers(Json::arrayValue);
+	Layer *pLayer = pStack->getLayer(0);
+	while(pLayer)
+	{
+		layers.append(pLayer->toJson());
+		pLayer = pLayer->next;
+	}
+	project["stack"]["layers"] = layers;
+	
+	ofs << project;
+	
+	return true;
+
+}
diff --git a/source/StackCreator.hpp b/source/StackCreator.hpp
new file mode 100644
index 0000000..273960e
--- /dev/null
+++ b/source/StackCreator.hpp
@@ -0,0 +1,36 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+/* 
+ * File:   StackCreator.hpp
+ * Author: jens
+ *
+ * Created on 17. Januar 2022, 18:04
+ */
+
+#ifndef STACKCREATOR_HPP
+#define STACKCREATOR_HPP
+
+#include <jsoncpp/json/json.h>
+#include "AStack.hpp"
+
+class StackCreator
+{
+public:
+	
+	static AStack* fromFile(const std::string &dir, const std::string &name, LayerConstructor *pLayerConstructor=nullptr);
+	static AStack* fromJson(Json::Value &project, LayerConstructor *pLayerConstructor=nullptr);
+	static bool toFile(AStack *pStack, const std::string &dir, const std::string &name);
+	
+private:
+	StackCreator();
+	StackCreator(const StackCreator& orig) = delete;
+	virtual ~StackCreator();
+
+};
+
+#endif /* STACKCREATOR_HPP */
+