diff --git a/src/include/helper_tools.h b/src/include/helper_tools.h
index e133713..e88f4b5 100644
--- a/src/include/helper_tools.h
+++ b/src/include/helper_tools.h
@@ -3,6 +3,7 @@
 #define __helper_tools_h__
 
 #include "base_def.h"
+#include "slice.h"
 
 namespace MultiArrayTools
 {
@@ -23,7 +24,9 @@ namespace MultiArrayTools
     auto mkMIndex(std::shared_ptr<IndexTypes>... indices)
 	-> decltype( getIndex( mkMulti( indices.range()... ) ) );
 
-    
+    template <class... RangeTypes>
+    auto mkMulti(std::tuple<std::shared_ptr<RangeTypes>...> rangesTuple)
+	-> MultiRange<RangeTypes...>;
 }
 
 /* ========================= *
@@ -66,6 +69,15 @@ namespace MultiArrayTools
 	(*mi)( indices... );
 	return mi;
     }
+
+    template <class... RangeTypes>
+    auto mkMulti(std::tuple<std::shared_ptr<RangeTypes>...> rangesTuple)
+	-> MultiRange<RangeTypes...>
+    {
+	MultiRangeFactory<RangeTypes...> mrf( rangesTuple );
+	return std::dynamic_pointer_cast<MultiRange<RangeTypes...> >( mrf.create() );
+    }
+
 }
 
 #endif
diff --git a/src/include/multi_array_base.h b/src/include/multi_array_base.h
index c8c93f5..b0fc699 100644
--- a/src/include/multi_array_base.h
+++ b/src/include/multi_array_base.h
@@ -54,8 +54,6 @@ namespace MultiArrayTools
 	operator()(std::shared_ptr<typename SRanges::IndexType>&... inds) const;
 	
 	virtual bool isInit() const;
-
-	// slice function !!!!!
 	
     protected:
 	bool mInit = false;
@@ -116,7 +114,7 @@ namespace MultiArrayTools
     {
 	ContainerRangeFactory<T,SRanges...> crf(ranges...);
 	mRange = std::dynamic_pointer_cast<ContainerRange<T,SRanges...> >( crf.create() );
-	mProtoI = std::make_shared<IndexType>( mRange );
+	mProtoI = std::make_shared<IndexType>( mRange, reinterpret_cast<std::intptr_t>(this) );
     }
 
     template <typename T, class... SRanges>
@@ -124,7 +122,7 @@ namespace MultiArrayTools
     {
 	ContainerRangeFactory<T,SRanges...> crf(space);
 	mRange = std::dynamic_pointer_cast<ContainerRange<T,SRanges...> >( crf.create() );
-	mProtoI = std::make_shared<IndexType>( mRange );
+	mProtoI = std::make_shared<IndexType>( mRange, reinterpret_cast<std::intptr_t>(this) );
     }
     
     template <typename T, class... SRanges>
diff --git a/src/include/ranges/container_range.h b/src/include/ranges/container_range.h
index a17c4e4..6755c48 100644
--- a/src/include/ranges/container_range.h
+++ b/src/include/ranges/container_range.h
@@ -41,6 +41,7 @@ namespace MultiArrayTools
 	IndexPack mIPack;
 	std::array<size_t,sizeof...(Indices)+1> mBlockSizes; 
 	const T* mData;
+	std::intptr_t mObjPtrNum;
 	
     public:
 
@@ -48,10 +49,12 @@ namespace MultiArrayTools
 	ContainerIndex& operator=(const ContainerIndex& in) = default;
 	
 	template <class MRange>
-	ContainerIndex(const std::shared_ptr<MRange>& range);
+	ContainerIndex(const std::shared_ptr<MRange>& range,
+		       std::intptr_t objPtrNum);
 
 	template <class MRange>
 	ContainerIndex(const std::shared_ptr<MRange>& range,
+		       std::intptr_t objPtrNum,
 		       const std::array<size_t,sizeof...(Indices)+1>& blockSizes);
 
 	template <size_t N>
@@ -104,6 +107,9 @@ namespace MultiArrayTools
 	auto iforh(Exprs exs) const
 	    -> decltype(RPackNum<sizeof...(Indices)-1>::mkForh(mIPack, exs));
 
+	std::intptr_t container() const;
+	ContainerIndex& format(const std::array<size_t,sizeof...(Indices)+1>& blocks);
+	
 	// Iterator Stuff
 	
 	ContainerIndex& setData(const T* data);
@@ -212,8 +218,10 @@ namespace MultiArrayTools
 
     template <typename T, class... Indices>
     template <class MRange>
-    ContainerIndex<T,Indices...>::ContainerIndex(const std::shared_ptr<MRange>& range) :
-	IndexInterface<ContainerIndex<T,Indices...>,std::tuple<typename Indices::MetaType...> >(range, 0)
+    ContainerIndex<T,Indices...>::ContainerIndex(const std::shared_ptr<MRange>& range,
+						 std::intptr_t objPtrNum) :
+	IndexInterface<ContainerIndex<T,Indices...>,std::tuple<typename Indices::MetaType...> >(range, 0),
+	mObjPtrNum(objPtrNum)
     {
 	RPackNum<sizeof...(Indices)-1>::construct(mIPack, *range);
 	std::get<sizeof...(Indices)>(mBlockSizes) = 1;
@@ -224,8 +232,10 @@ namespace MultiArrayTools
     template <typename T, class... Indices>
     template <class MRange>
     ContainerIndex<T,Indices...>::ContainerIndex(const std::shared_ptr<MRange>& range,
+						 std::intptr_t objPtrNum,
 						 const std::array<size_t,sizeof...(Indices)+1>& blockSizes) :
-	IndexInterface<ContainerIndex<T,Indices...>,std::tuple<typename Indices::MetaType...> >(range, 0)
+	IndexInterface<ContainerIndex<T,Indices...>,std::tuple<typename Indices::MetaType...> >(range, 0),
+	mObjPtrNum(objPtrNum)
     {
 	RPackNum<sizeof...(Indices)-1>::construct(mIPack, *range);
 	mBlockSizes = blockSizes;
@@ -421,6 +431,20 @@ namespace MultiArrayTools
     {
 	return RPackNum<sizeof...(Indices)-1>::mkForh(mIPack, exs);
     }
+
+    template <typename T, class... Indices>
+    std::intptr_t ContainerIndex<T,Indices...>::container() const
+    {
+	return mObjPtrNum;
+    }
+
+    template <typename T, class... Indices>
+    ContainerIndex<T,Indices...>& ContainerIndex<T,Indices...>::
+    format(const std::array<size_t,sizeof...(Indices)+1>& blocks)
+    {
+	mBlockSizes = blocks;
+	return *this;
+    }
     
     template <typename T, class... Indices>
     ContainerIndex<T,Indices...>& ContainerIndex<T,Indices...>::setData(const T* data)
diff --git a/src/include/ranges/multi_range.h b/src/include/ranges/multi_range.h
index 4e8b730..8ce6396 100644
--- a/src/include/ranges/multi_range.h
+++ b/src/include/ranges/multi_range.h
@@ -31,6 +31,7 @@ namespace MultiArrayTools
 	typedef std::tuple<std::shared_ptr<Indices>...> IndexPack;
 	typedef std::tuple<typename Indices::MetaType...> MetaType;
 	typedef MultiRange<typename Indices::RangeType...> RangeType;
+	typedef MultiIndex IType;
 
 	static constexpr IndexType sType() { return IndexType::MULTI; }
 	static constexpr size_t sDim() { return sizeof...(Indices); }
@@ -143,7 +144,8 @@ namespace MultiArrayTools
     public:
 	typedef RangeBase RB;
 	typedef std::tuple<std::shared_ptr<Ranges>...> SpaceType;
-	typedef MultiIndex<typename Ranges::IndexType...> IndexType;	
+	typedef MultiIndex<typename Ranges::IndexType...> IndexType;
+	typedef MultiRange RangeType;
 	//typedef typename RangeInterface<MultiIndex<typename Ranges::IndexType...> >::IndexType IndexType;
 
     protected:
diff --git a/src/include/ranges/range_types/classic_range.h b/src/include/ranges/range_types/classic_range.h
index 5ff0649..807cc02 100644
--- a/src/include/ranges/range_types/classic_range.h
+++ b/src/include/ranges/range_types/classic_range.h
@@ -28,6 +28,7 @@ namespace MultiArrayTools
     public:
 	typedef RangeBase RB;
 	typedef typename RangeInterface<SingleIndex<size_t,SpaceType::NONE> >::IndexType IndexType;
+	typedef SingleRange<size_t,SpaceType::NONE> RangeType;
 	
 	virtual size_t size() const override;
 	virtual size_t dim() const override;
diff --git a/src/include/ranges/range_types/spin_range.h b/src/include/ranges/range_types/spin_range.h
index c9215f2..c21de74 100644
--- a/src/include/ranges/range_types/spin_range.h
+++ b/src/include/ranges/range_types/spin_range.h
@@ -32,6 +32,7 @@ namespace MultiArrayTools
     public:
 	typedef RangeBase RB;
 	typedef typename RangeInterface<SingleIndex<size_t,SpaceType::SPIN> >::IndexType IndexType;
+	typedef SingleRange<size_t,SpaceType::SPIN> RangeType;
 	
 	virtual size_t size() const override;
 	virtual size_t dim() const override;
diff --git a/src/include/ranges/single_range.h b/src/include/ranges/single_range.h
index 75e2b79..c23d10d 100644
--- a/src/include/ranges/single_range.h
+++ b/src/include/ranges/single_range.h
@@ -26,6 +26,7 @@ namespace MultiArrayTools
 	typedef IndexInterface<SingleIndex<U,TYPE>,U> IB;
 	typedef U MetaType;
 	typedef SingleRange<U,TYPE> RangeType;
+	typedef SingleIndex IType;
 
 	//DEFAULT_MEMBERS_X(SingleIndex);
 	
@@ -92,6 +93,7 @@ namespace MultiArrayTools
     public:
 	typedef RangeBase RB;
 	typedef SingleIndex<U,TYPE> IndexType;
+	typedef SingleRange RangeType;
 	//typedef typename RangeInterface<SingleIndex<U,TYPE> >::IndexType IndexType;
 	
 	virtual size_t size() const override;
diff --git a/src/include/slice.h b/src/include/slice.h
index de6bfa0..f68d340 100644
--- a/src/include/slice.h
+++ b/src/include/slice.h
@@ -14,30 +14,30 @@ namespace MultiArrayTools
 
 	typedef ContainerRange<T,SRanges...> CRange;
 	typedef MultiArrayBase<T,SRanges...> MAB;
-	typedef typename CRange::IndexType IndexType;
+	typedef typename CRange::IndexType IType;
 	
 	DEFAULT_MEMBERS(Slice);
 
-	template <class... RITypes> // Range / Index <-> open / const 
-	Slice(T* data, const RITypes&... ris);
+	// RITypes = Range XOR Index depending on whether const XOR opern
+	template <class... RITypes>
+	Slice(MutableMultiArrayBase<T,typename RITypes::RangeType...>& ma,
+	      const std::shared_ptr<RITypes>&... ris);
 	
-	virtual const T& operator[](const IndexType& i) const override;
-	virtual T& operator[](const IndexType& i) override;
-	virtual const T& at(const typename CRange::IndexType::MetaType& meta) const override;
-	virtual T& at(const typename CRange::IndexType::MetaType& meta) override;
+	virtual const T& operator[](const IType& i) const override;
+	virtual T& operator[](const IType& i) override;
+	virtual const T& at(const typename IType::MetaType& meta) const override;
+	virtual T& at(const typename IType::MetaType& meta) override;
 
 	virtual const T* data() const override;
 	virtual T* data() override;
 
 	virtual bool isSlice() const override;
 
-	virtual IndexType begin() const override;
-	virtual IndexType end() const override;
+	virtual auto begin() const -> IType override;
+	virtual auto end() const -> IType override;
 	
     private:
 	T* mData;
-	size_t mStartPos;
-	std::array<size_t,sizeof...(SRange)+1> mBlockSizes;
     };
     
 } // end namespace MultiArrayTools
@@ -52,6 +52,17 @@ namespace MultiArrayTools
     namespace
     {
 
+	//size_t sum(size_t arg)
+	//{
+	//    return arg;
+	//}
+	
+	template <typename... SizeTypes>
+	size_t sum(size_t arg, SizeTypes... args)
+	{
+	    return arg + sum(args...);
+	}
+	
 	template <bool ISINDEX>
 	struct XX
 	{
@@ -61,6 +72,12 @@ namespace MultiArrayTools
 	    {
 		return std::make_tuple(ri);
 	    }
+
+	    template <class RI>
+	    static size_t ri_to_start_pos(const std::shared_ptr<RI>& ri)
+	    {
+		return 0;
+	    }
 	};
 
 	template <>
@@ -72,52 +89,69 @@ namespace MultiArrayTools
 	    {
 		return std::make_tuple();
 	    }
+
+	    template <class RI>
+	    static size_t ri_to_start_pos(const std::shared_ptr<RI>& ri)
+	    {
+		return ri->pos();
+	    }
+
 	};
 	
 	template <class... RITypes>
 	auto mkSliceRange(const std::shared_ptr<RITypes>&... ris)
+	    -> decltype(std::tuple_cat(XX<RITypes::ISINDEX>::ri_to_tuple(ris)...))
 	{
 	    return std::tuple_cat(XX<RITypes::ISINDEX>::ri_to_tuple(ris)...);
 	}
 
+	template <class... RITypes>
+	size_t mkStartPos(const std::shared_ptr<RITypes>&... ris)
+	{
+	    return sum(ri_to_start_pos(ris)...);
+	}
+	
     }
     
     /*************
      *  Slice    *	     
      *************/
-    /*
+    
     template <typename T, class... SRanges>
-    Slice<T,SRanges...>::Slice(T* data, const RITypes&... ris) :
+    template <class... RITypes>
+    Slice<T,SRanges...>::Slice(MutableMultiArrayBase<T,typename RITypes::RangeType...>& ma,
+			       const std::shared_ptr<RITypes>&... ris) :
 	MutableMultiArrayBase<T,SRanges...>( mkSliceRange(ris...) ),
-	mData(data),
-	mStartPos(mkSliceStart(ris...)),
-	mBlockSizes(mkSliceBlocks(ris...)) {}
-    */ //!!!!!
+	mData(ma.data() + mkStartPos(ris...))
+    {
+	MAB::mProtoI.format( mBlockSizes(mkSliceBlocks(ris...)) );
+    }
+    
     template <typename T, class... SRanges>
-    const T& Slice<T,SRanges...>::operator[](const IndexType& i) const
+    const T& Slice<T,SRanges...>::operator[](const IType& i) const
     {
 	assert(i.sliceMode()); // -> compare objects !!!!!
+	assert(i.container() == reinterpret_cast<std::intptr_t>(this));
 	return mData[ i.pos() ];
     }
 
     template <typename T, class... SRanges>
-    T& Slice<T,SRanges...>::operator[](const IndexType& i)
+    T& Slice<T,SRanges...>::operator[](const IType& i)
     {
 	assert(i.sliceMode());
+	assert(i.container() == reinterpret_cast<std::intptr_t>(this));
 	return mData[ i.pos() ];
     }
 
     template <typename T, class... SRanges>
-    const T& Slice<T,SRanges...>::at(const typename CRange::IndexType::MetaType& meta) const
+    const T& Slice<T,SRanges...>::at(const typename IType::MetaType& meta) const
     {
-	assert(i.sliceMode());
 	return mData[ begin().at(meta).pos() ];
     }
 
     template <typename T, class... SRanges>
-    T& Slice<T,SRanges...>::at(const typename CRange::IndexType::MetaType& meta)
+    T& Slice<T,SRanges...>::at(const typename IType::MetaType& meta)
     {
-	assert(i.sliceMode());
 	return mData[ begin().at(meta).pos() ];
     }
 
@@ -140,18 +174,20 @@ namespace MultiArrayTools
     }
 
     template <typename T, class... SRanges>
-    IndexType Slice<T,SRanges...>::begin() const
+    auto Slice<T,SRanges...>::begin() const -> Slice<T,SRanges...>::IType 
     {
-	IndexType i(mRange, mBlockSizes);
-	i = mStartPos;
+	IType i = MAB::mProtoI;
+	i = 0;
+	//i = mStartPos;
 	return i.setData(data());
     }
 
     template <typename T, class... SRanges>
-    IndexType Slice<T,SRanges...>::end() const
+    auto Slice<T,SRanges...>::end() const -> Slice<T,SRanges...>::IType 
     {
-	IndexType i(mRange, mBlockSizes);
-	i = std::get<sizeof...(SRanges)>(mBlockSizes);
+	IType i = MAB::mProtoI;
+	i = i.max(); // CHECK !!!
+	//i = std::get<sizeof...(SRanges)>(mBlockSizes);
 	return i.setData(data());
     }
 
diff --git a/src/tests/ranges/index_unit_test.cc b/src/tests/ranges/index_unit_test.cc
index 41bac60..d4289f6 100644
--- a/src/tests/ranges/index_unit_test.cc
+++ b/src/tests/ranges/index_unit_test.cc
@@ -184,10 +184,10 @@ namespace {
 
 	auto mi = mstrptr->begin();
 	//auto ci1 = cr1ptr->begin();
-	CIndex ci1(cr1ptr);
+	CIndex ci1(cr1ptr, 0);
 	ci1 = 0;
 	//auto ci2 = cr2ptr->begin();
-	CIndex ci2(cr2ptr);
+	CIndex ci2(cr2ptr, 0);
 	ci2 = 0;
 	
 	EXPECT_EQ(ci1.max(), 16u);