diff --git a/src/blackmisc/avaltitude.cpp b/src/blackmisc/avaltitude.cpp
index 718600400..c2965d61f 100644
--- a/src/blackmisc/avaltitude.cpp
+++ b/src/blackmisc/avaltitude.cpp
@@ -25,7 +25,7 @@ QString CAltitude::stringForConverter() const
 /*
  * Assigment
  */
-CAltitude& CAltitude::operator =(const CAltitude &otherAltitude)
+CAltitude &CAltitude::operator =(const CAltitude &otherAltitude)
 {
     // Check for self-assignment!
     if (this == &otherAltitude)  return *this;
diff --git a/src/blackmisc/aviobase.h b/src/blackmisc/aviobase.h
index da1c5b738..1973f1ee7 100644
--- a/src/blackmisc/aviobase.h
+++ b/src/blackmisc/aviobase.h
@@ -19,7 +19,7 @@ namespace Aviation
 /*!
  * \brief Base class for avionics
  */
-class CAvionicsBase : public CBaseStreamStringifier<CAvionicsBase>
+class CAvionicsBase : public CBaseStreamStringifier
 {
 
 private:
diff --git a/src/blackmisc/basestreamstringifier.h b/src/blackmisc/basestreamstringifier.h
index c11b2e08e..2e24513df 100644
--- a/src/blackmisc/basestreamstringifier.h
+++ b/src/blackmisc/basestreamstringifier.h
@@ -12,7 +12,7 @@ namespace BlackMisc
 /*!
  * \brief Provides "to QString" and stream operators
  */
-template <class UsingClass> class CBaseStreamStringifier
+class CBaseStreamStringifier
 {
     /*!
      * \brief Stream << overload to be used in debugging messages
@@ -20,13 +20,13 @@ template <class UsingClass> class CBaseStreamStringifier
      * \param uc
      * \return
      */
-    friend QDebug operator<<(QDebug debug, const UsingClass &uc)
+    friend QDebug operator<<(QDebug debug, const CBaseStreamStringifier &uc)
     {
         const CBaseStreamStringifier &sf = uc; // allows to acces protected method
         debug << sf.stringForStreaming();
         return debug;
     }
-    // msvc2010: friend QDebug &operator<<(QDebug &debug, const UsingClass &uc)
+    // msvc2010: friend QDebug &operator<<(QDebug &debug, const CBaseStreamStringifier &uc)
     // MinGW: No reference
 
     /*!
@@ -35,7 +35,7 @@ template <class UsingClass> class CBaseStreamStringifier
      * \param uc
      * \return
      */
-    friend QTextStream &operator<<(QTextStream &textStream, const UsingClass &uc)
+    friend QTextStream &operator<<(QTextStream &textStream, const CBaseStreamStringifier &uc)
     {
         const CBaseStreamStringifier &sf = uc; // allows to acces protected method
         textStream << sf.stringForStreaming();
@@ -48,7 +48,7 @@ template <class UsingClass> class CBaseStreamStringifier
      * \param uc
      * \return
      */
-    friend QNoDebug operator<<(QNoDebug nodebug, const UsingClass &uc)
+    friend QNoDebug operator<<(QNoDebug nodebug, const CBaseStreamStringifier & /* uc */)
     {
         return nodebug;
     }
@@ -59,7 +59,7 @@ template <class UsingClass> class CBaseStreamStringifier
      * \param uc
      * \return
      */
-    friend QDataStream &operator<<(QDataStream &stream, const UsingClass &uc)
+    friend QDataStream &operator<<(QDataStream &stream, const CBaseStreamStringifier &uc)
     {
         const CBaseStreamStringifier &sf = uc; // allows to acces protected method
         stream << sf.stringForStreaming();
@@ -72,7 +72,7 @@ template <class UsingClass> class CBaseStreamStringifier
      * \param uc
      * \return
      */
-    friend CLogMessage operator<<(CLogMessage log, const UsingClass &uc)
+    friend CLogMessage operator<<(CLogMessage log, const CBaseStreamStringifier &uc)
     {
         const CBaseStreamStringifier &sf = uc; // allows to acces protected method
         log << sf.stringForStreaming();
@@ -85,7 +85,7 @@ template <class UsingClass> class CBaseStreamStringifier
      * \param uc
      * \return
      */
-    friend std::ostream &operator<<(std::ostream &ostr, const UsingClass &uc)
+    friend std::ostream &operator<<(std::ostream &ostr, const CBaseStreamStringifier &uc)
     {
         const CBaseStreamStringifier &sf = uc; // allows to acces protected method
         ostr << sf.stringForStreaming().toStdString();
diff --git a/src/blackmisc/coordinategeodetic.h b/src/blackmisc/coordinategeodetic.h
index a41d1f5ed..228ab7bed 100644
--- a/src/blackmisc/coordinategeodetic.h
+++ b/src/blackmisc/coordinategeodetic.h
@@ -37,7 +37,7 @@ class ICoordinateGeodetic
  * \brief Geodetic coordinate
  */
 class CCoordinateGeodetic :
-    public CBaseStreamStringifier<CCoordinateGeodetic>,
+    public CBaseStreamStringifier,
     public ICoordinateGeodetic
 {
 
diff --git a/src/blackmisc/mathmatrixbase.h b/src/blackmisc/mathmatrixbase.h
index a6fd8b2ab..bfd2d8c81 100644
--- a/src/blackmisc/mathmatrixbase.h
+++ b/src/blackmisc/mathmatrixbase.h
@@ -18,7 +18,7 @@ namespace Math
 /*!
  * \brief Base functionality of a matrix
  */
-template<class ImplMatrix, int Rows, int Columns> class CMatrixBase : public BlackMisc::CBaseStreamStringifier<ImplMatrix>
+template<class ImplMatrix, int Rows, int Columns> class CMatrixBase : public BlackMisc::CBaseStreamStringifier
 {
 private:
     /*!
diff --git a/src/blackmisc/mathvector3dbase.h b/src/blackmisc/mathvector3dbase.h
index 9fea8ac0a..48ea18b38 100644
--- a/src/blackmisc/mathvector3dbase.h
+++ b/src/blackmisc/mathvector3dbase.h
@@ -21,7 +21,7 @@ class CMatrix3x1; // forward declaration
 /*!
  * \brief 3D vector base (x, y, z)
  */
-template <class ImplVector> class CVector3DBase : public CBaseStreamStringifier<ImplVector>
+template <class ImplVector> class CVector3DBase : public CBaseStreamStringifier
 {
 
 private:
diff --git a/src/blackmisc/pqbase.h b/src/blackmisc/pqbase.h
index 94e1cc497..ae37c6a8f 100644
--- a/src/blackmisc/pqbase.h
+++ b/src/blackmisc/pqbase.h
@@ -23,7 +23,7 @@ namespace PhysicalQuantities
  * Use the static values such CMeasurementMultiplier::k() as to specify values.
  * \author KWB
  */
-class CMeasurementPrefix : public CBaseStreamStringifier<CMeasurementPrefix>
+class CMeasurementPrefix : public CBaseStreamStringifier
 {
 private:
     QString m_name; //!< name, e.g. "kilo"
@@ -130,6 +130,14 @@ public:
         return this->m_prefix;
     }
 
+    /*!
+     * \brief Operator as double
+     */
+    operator double() const
+    {
+        return this->m_factor;
+    }
+
     // --- static units, always use these for initialization
     // --- Remark: Static initialization in C++ is random, this is why no static members
     // --- are used
@@ -143,6 +151,7 @@ public:
         static CMeasurementPrefix none("", "", 0.0);
         return none;
     }
+
     /*!
      * \brief Unit "One"
      * \return
@@ -152,6 +161,7 @@ public:
         static CMeasurementPrefix one("one", "", 1.0);
         return one;
     }
+
     /*!
      * \brief Unit "mega"
      * \return
@@ -161,6 +171,7 @@ public:
         static CMeasurementPrefix mega("mega", "M", 1E6);
         return mega;
     }
+
     /*!
      * \brief Unit "kilo"
      * \return
@@ -170,6 +181,7 @@ public:
         static CMeasurementPrefix kilo("kilo", "k", 1000.0);
         return kilo;
     }
+
     /*!
      * \brief Unit "giga"
      * \return
@@ -179,6 +191,7 @@ public:
         static CMeasurementPrefix giga("giga", "G", 1E9);
         return giga;
     }
+
     /*!
      * \brief Unit "hecto"
      * \return
@@ -188,6 +201,7 @@ public:
         static CMeasurementPrefix hecto("hecto", "h", 100.0);
         return hecto;
     }
+
     /*!
      * \brief Unit "centi"
      * \return
@@ -197,6 +211,7 @@ public:
         static CMeasurementPrefix centi("centi", "c", 0.01);
         return centi;
     }
+
     /*!
      * \brief Unit "milli"
      * \return
@@ -216,7 +231,7 @@ public:
 /*!
  * \brief Base class for all units, such as meter, hertz.
  */
-class CMeasurementUnit: public CBaseStreamStringifier<CMeasurementUnit>
+class CMeasurementUnit: public CBaseStreamStringifier
 {
 protected:
     /*!
diff --git a/src/blackmisc/pqphysicalquantity.h b/src/blackmisc/pqphysicalquantity.h
index e5c3c7e3d..815bc9ca2 100644
--- a/src/blackmisc/pqphysicalquantity.h
+++ b/src/blackmisc/pqphysicalquantity.h
@@ -21,7 +21,7 @@ namespace PhysicalQuantities
 /*!
  * \brief A physical quantity such as "5m", "20s", "1500ft/s"
  */
-template <class MU, class PQ> class CPhysicalQuantity : public BlackMisc::CBaseStreamStringifier<PQ>
+template <class MU, class PQ> class CPhysicalQuantity : public BlackMisc::CBaseStreamStringifier
 {
 private:
     double m_unitValueD; //!< value backed by double