diff --git a/Components/Transforms/AffineLogStackTransform/elxAffineLogStackTransform.hxx b/Components/Transforms/AffineLogStackTransform/elxAffineLogStackTransform.hxx
index 4d0f63df7..5906961b6 100644
--- a/Components/Transforms/AffineLogStackTransform/elxAffineLogStackTransform.hxx
+++ b/Components/Transforms/AffineLogStackTransform/elxAffineLogStackTransform.hxx
@@ -21,6 +21,7 @@
 #include "elxAffineLogStackTransform.h"
 
 #include "itkImageRegionExclusionConstIteratorWithIndex.h"
+#include <itkDeref.h>
 #include <vnl/vnl_math.h>
 
 namespace elastix
@@ -100,11 +101,12 @@ AffineLogStackTransform<TElastix>::ReadFromFile()
 {
   if (!this->HasITKTransformParameters())
   {
+    const Configuration & configuration = itk::Deref(Superclass2::GetConfiguration());
+
     /** Read stack-spacing, stack-origin and number of sub-transforms. */
-    this->GetConfiguration()->ReadParameter(
-      m_NumberOfSubTransforms, "NumberOfSubTransforms", this->GetComponentLabel(), 0, 0);
-    this->GetConfiguration()->ReadParameter(m_StackOrigin, "StackOrigin", this->GetComponentLabel(), 0, 0);
-    this->GetConfiguration()->ReadParameter(m_StackSpacing, "StackSpacing", this->GetComponentLabel(), 0, 0);
+    configuration.ReadParameter(m_NumberOfSubTransforms, "NumberOfSubTransforms", this->GetComponentLabel(), 0, 0);
+    configuration.ReadParameter(m_StackOrigin, "StackOrigin", this->GetComponentLabel(), 0, 0);
+    configuration.ReadParameter(m_StackSpacing, "StackSpacing", this->GetComponentLabel(), 0, 0);
 
     ReducedDimensionInputPointType RDcenterOfRotationPoint{};
 
@@ -184,17 +186,19 @@ AffineLogStackTransform<TElastix>::InitializeTransform()
   SizeType fixedImageSize =
     this->m_Registration->GetAsITKBaseType()->GetFixedImage()->GetLargestPossibleRegion().GetSize();
 
+  const Configuration & configuration = itk::Deref(Superclass2::GetConfiguration());
+
   for (unsigned int i = 0; i < ReducedSpaceDimension; ++i)
   {
     /** Check COR index: Returns zero when parameter was in the parameter file. */
-    bool foundI = this->m_Configuration->ReadParameter(centerOfRotationIndex[i], "CenterOfRotation", i, false);
+    bool foundI = configuration.ReadParameter(centerOfRotationIndex[i], "CenterOfRotation", i, false);
     if (!foundI)
     {
       centerGivenAsIndex = false;
     }
 
     /** Check COR point: Returns zero when parameter was in the parameter file. */
-    bool foundP = this->m_Configuration->ReadParameter(RDcenterOfRotationPoint[i], "CenterOfRotationPoint", i, false);
+    bool foundP = configuration.ReadParameter(RDcenterOfRotationPoint[i], "CenterOfRotationPoint", i, false);
     if (!foundP)
     {
       centerGivenAsPoint = false;
@@ -207,7 +211,7 @@ AffineLogStackTransform<TElastix>::InitializeTransform()
    */
   bool automaticTransformInitialization = false;
   bool tmpBool = false;
-  this->m_Configuration->ReadParameter(tmpBool, "AutomaticTransformInitialization", 0);
+  configuration.ReadParameter(tmpBool, "AutomaticTransformInitialization", 0);
   if (tmpBool && this->Superclass1::GetInitialTransform() == nullptr)
   {
     automaticTransformInitialization = true;
@@ -270,17 +274,19 @@ template <class TElastix>
 void
 AffineLogStackTransform<TElastix>::SetScales()
 {
+  const Configuration & configuration = itk::Deref(Superclass2::GetConfiguration());
+
   /** Create the new scales. */
   const NumberOfParametersType numberOfParameters = this->GetNumberOfParameters();
   ScalesType                   newscales(numberOfParameters);
 
   /** Check if automatic scales estimation is desired. */
   bool automaticScalesEstimation = false;
-  this->m_Configuration->ReadParameter(automaticScalesEstimation, "AutomaticScalesEstimation", 0);
+  configuration.ReadParameter(automaticScalesEstimation, "AutomaticScalesEstimation", 0);
 
   /** Check also AutomaticScalesEstimationStackTransform for backwards compatability. */
   bool automaticScalesEstimationStackTransform = false;
-  this->m_Configuration->ReadParameter(
+  configuration.ReadParameter(
     automaticScalesEstimationStackTransform, "AutomaticScalesEstimationStackTransform", 0, false);
 
   if (automaticScalesEstimationStackTransform)
@@ -327,7 +333,7 @@ AffineLogStackTransform<TElastix>::SetScales()
     const unsigned int rotationPart = (ReducedSpaceDimension) * (ReducedSpaceDimension);
     const unsigned int totalPart = (SpaceDimension) * (ReducedSpaceDimension);
 
-    /** this->m_Configuration->ReadParameter() returns 0 if there is a value given
+    /** configuration.ReadParameter() returns 0 if there is a value given
      * in the parameter-file, and returns 1 if there is no value given in the
      * parameter-file.
      * Check which option is used:
@@ -343,7 +349,7 @@ AffineLogStackTransform<TElastix>::SetScales()
     int sizeLastDimension =
       this->GetElastix()->GetFixedImage()->GetLargestPossibleRegion().GetSize()[SpaceDimension - 1];
 
-    std::size_t count = this->m_Configuration->CountNumberOfParameterEntries("Scales");
+    std::size_t count = configuration.CountNumberOfParameterEntries("Scales");
 
     /** Check which of the above options is used. */
     if (count == 0)
@@ -363,7 +369,7 @@ AffineLogStackTransform<TElastix>::SetScales()
     {
       /** In this case the second option is used. */
       double scale = defaultScalingvalue;
-      this->m_Configuration->ReadParameter(scale, "Scales", 0);
+      configuration.ReadParameter(scale, "Scales", 0);
       newscales.Fill(scale);
 
       /** The non-rotation scales are set to 1.0 */
@@ -379,7 +385,7 @@ AffineLogStackTransform<TElastix>::SetScales()
       /** In this case the third option is used. */
       for (unsigned int i = 0; i < numberOfParameters; ++i)
       {
-        this->m_Configuration->ReadParameter(newscales[i], "Scales", i);
+        configuration.ReadParameter(newscales[i], "Scales", i);
       }
     }
     else
diff --git a/Components/Transforms/BSplineStackTransform/elxBSplineStackTransform.hxx b/Components/Transforms/BSplineStackTransform/elxBSplineStackTransform.hxx
index ed1ad9c7b..ebcfd1bc1 100644
--- a/Components/Transforms/BSplineStackTransform/elxBSplineStackTransform.hxx
+++ b/Components/Transforms/BSplineStackTransform/elxBSplineStackTransform.hxx
@@ -21,6 +21,7 @@
 #include "elxBSplineStackTransform.h"
 
 #include "itkImageRegionExclusionConstIteratorWithIndex.h"
+#include <itkDeref.h>
 #include <vnl/vnl_math.h>
 
 namespace elastix
@@ -224,16 +225,18 @@ BSplineStackTransform<TElastix>::PreComputeGridInformation()
    * Which is the default schedule, if no GridSpacingSchedule is supplied.
    */
 
+  const Configuration & configuration = itk::Deref(Superclass2::GetConfiguration());
+
   /** Determine which method is used. */
   bool        method1 = false;
-  std::size_t count1 = this->m_Configuration->CountNumberOfParameterEntries("FinalGridSpacingInVoxels");
+  std::size_t count1 = configuration.CountNumberOfParameterEntries("FinalGridSpacingInVoxels");
   if (count1 > 0)
   {
     method1 = true;
   }
 
   bool        method2 = false;
-  std::size_t count2 = this->m_Configuration->CountNumberOfParameterEntries("FinalGridSpacingInPhysicalUnits");
+  std::size_t count2 = configuration.CountNumberOfParameterEntries("FinalGridSpacingInPhysicalUnits");
   if (count2 > 0)
   {
     method2 = true;
@@ -257,7 +260,7 @@ BSplineStackTransform<TElastix>::PreComputeGridInformation()
   {
     for (unsigned int dim = 0; dim < ReducedSpaceDimension; ++dim)
     {
-      this->m_Configuration->ReadParameter(
+      configuration.ReadParameter(
         finalGridSpacingInVoxels[dim], "FinalGridSpacingInVoxels", this->GetComponentLabel(), dim, 0);
     }
 
@@ -274,7 +277,7 @@ BSplineStackTransform<TElastix>::PreComputeGridInformation()
   {
     for (unsigned int dim = 0; dim < ReducedSpaceDimension; ++dim)
     {
-      this->m_Configuration->ReadParameter(
+      configuration.ReadParameter(
         finalGridSpacingInPhysicalUnits[dim], "FinalGridSpacingInPhysicalUnits", this->GetComponentLabel(), dim, 0);
     }
   }
@@ -285,7 +288,7 @@ BSplineStackTransform<TElastix>::PreComputeGridInformation()
   m_GridScheduleComputer->GetSchedule(gridSchedule);
 
   /** Read what the user has specified. This overrules everything. */
-  count2 = this->m_Configuration->CountNumberOfParameterEntries("GridSpacingSchedule");
+  count2 = configuration.CountNumberOfParameterEntries("GridSpacingSchedule");
   unsigned int entry_nr = 0;
   if (count2 == 0)
   {
@@ -297,7 +300,7 @@ BSplineStackTransform<TElastix>::PreComputeGridInformation()
     {
       for (unsigned int dim = 0; dim < ReducedSpaceDimension; ++dim)
       {
-        this->m_Configuration->ReadParameter(gridSchedule[res][dim], "GridSpacingSchedule", entry_nr, false);
+        configuration.ReadParameter(gridSchedule[res][dim], "GridSpacingSchedule", entry_nr, false);
       }
       ++entry_nr;
     }
@@ -308,7 +311,7 @@ BSplineStackTransform<TElastix>::PreComputeGridInformation()
     {
       for (unsigned int dim = 0; dim < ReducedSpaceDimension; ++dim)
       {
-        this->m_Configuration->ReadParameter(gridSchedule[res][dim], "GridSpacingSchedule", entry_nr, false);
+        configuration.ReadParameter(gridSchedule[res][dim], "GridSpacingSchedule", entry_nr, false);
         ++entry_nr;
       }
     }
@@ -444,16 +447,17 @@ BSplineStackTransform<TElastix>::ReadFromFile()
 {
   if (!this->HasITKTransformParameters())
   {
+    const Configuration & configuration = itk::Deref(Superclass2::GetConfiguration());
+
     /** Read spline order settings and initialize BSplineTransform. */
     m_SplineOrder = 3;
-    this->GetConfiguration()->ReadParameter(
-      m_SplineOrder, "BSplineTransformSplineOrder", this->GetComponentLabel(), 0, 0);
+    configuration.ReadParameter(m_SplineOrder, "BSplineTransformSplineOrder", this->GetComponentLabel(), 0, 0);
 
     /** Read stack-spacing, stack-origin and number of sub-transforms. */
-    bool dummy = this->GetConfiguration()->ReadParameter(
-      m_NumberOfSubTransforms, "NumberOfSubTransforms", this->GetComponentLabel(), 0, 0);
-    dummy |= this->GetConfiguration()->ReadParameter(m_StackOrigin, "StackOrigin", this->GetComponentLabel(), 0, 0);
-    dummy |= this->GetConfiguration()->ReadParameter(m_StackSpacing, "StackSpacing", this->GetComponentLabel(), 0, 0);
+    bool dummy =
+      configuration.ReadParameter(m_NumberOfSubTransforms, "NumberOfSubTransforms", this->GetComponentLabel(), 0, 0);
+    dummy |= configuration.ReadParameter(m_StackOrigin, "StackOrigin", this->GetComponentLabel(), 0, 0);
+    dummy |= configuration.ReadParameter(m_StackSpacing, "StackSpacing", this->GetComponentLabel(), 0, 0);
 
     /** Initialize the right B-spline transform. */
     this->InitializeBSplineTransform();
@@ -475,13 +479,13 @@ BSplineStackTransform<TElastix>::ReadFromFile()
     /** Get GridSize, GridIndex, GridSpacing and GridOrigin. */
     for (unsigned int i = 0; i < ReducedSpaceDimension; ++i)
     {
-      dummy |= this->m_Configuration->ReadParameter(gridsize[i], "GridSize", i);
-      dummy |= this->m_Configuration->ReadParameter(gridindex[i], "GridIndex", i);
-      dummy |= this->m_Configuration->ReadParameter(gridspacing[i], "GridSpacing", i);
-      dummy |= this->m_Configuration->ReadParameter(gridorigin[i], "GridOrigin", i);
+      dummy |= configuration.ReadParameter(gridsize[i], "GridSize", i);
+      dummy |= configuration.ReadParameter(gridindex[i], "GridIndex", i);
+      dummy |= configuration.ReadParameter(gridspacing[i], "GridSpacing", i);
+      dummy |= configuration.ReadParameter(gridorigin[i], "GridOrigin", i);
       for (unsigned int j = 0; j < ReducedSpaceDimension; ++j)
       {
-        this->m_Configuration->ReadParameter(griddirection(j, i), "GridDirection", i * ReducedSpaceDimension + j);
+        configuration.ReadParameter(griddirection(j, i), "GridDirection", i * ReducedSpaceDimension + j);
       }
     }
 
diff --git a/Components/Transforms/EulerStackTransform/elxEulerStackTransform.hxx b/Components/Transforms/EulerStackTransform/elxEulerStackTransform.hxx
index 4f878b3d2..027d8b206 100644
--- a/Components/Transforms/EulerStackTransform/elxEulerStackTransform.hxx
+++ b/Components/Transforms/EulerStackTransform/elxEulerStackTransform.hxx
@@ -19,6 +19,7 @@
 #define elxEulerStackTransform_hxx
 
 #include "elxEulerStackTransform.h"
+#include <itkDeref.h>
 
 namespace elastix
 {
@@ -96,11 +97,12 @@ EulerStackTransform<TElastix>::ReadFromFile()
 {
   if (!this->HasITKTransformParameters())
   {
+    const Configuration & configuration = itk::Deref(Superclass2::GetConfiguration());
+
     /** Read stack-spacing, stack-origin and number of sub-transforms. */
-    this->GetConfiguration()->ReadParameter(
-      m_NumberOfSubTransforms, "NumberOfSubTransforms", this->GetComponentLabel(), 0, 0);
-    this->GetConfiguration()->ReadParameter(m_StackOrigin, "StackOrigin", this->GetComponentLabel(), 0, 0);
-    this->GetConfiguration()->ReadParameter(m_StackSpacing, "StackSpacing", this->GetComponentLabel(), 0, 0);
+    configuration.ReadParameter(m_NumberOfSubTransforms, "NumberOfSubTransforms", this->GetComponentLabel(), 0, 0);
+    configuration.ReadParameter(m_StackOrigin, "StackOrigin", this->GetComponentLabel(), 0, 0);
+    configuration.ReadParameter(m_StackSpacing, "StackSpacing", this->GetComponentLabel(), 0, 0);
 
     ReducedDimensionInputPointType RDcenterOfRotationPoint{};
 
@@ -163,6 +165,7 @@ template <class TElastix>
 void
 EulerStackTransform<TElastix>::InitializeTransform()
 {
+  const Configuration & configuration = itk::Deref(Superclass2::GetConfiguration());
 
   /** Set all parameters to zero (no rotations, no translation). */
   m_DummySubTransform->SetIdentity();
@@ -185,15 +188,14 @@ EulerStackTransform<TElastix>::InitializeTransform()
   for (unsigned int i = 0; i < ReducedSpaceDimension; ++i)
   {
     /** Check COR index: Returns zero when parameter was in the parameter file. */
-    const bool foundI = this->m_Configuration->ReadParameter(centerOfRotationIndex[i], "CenterOfRotation", i, false);
+    const bool foundI = configuration.ReadParameter(centerOfRotationIndex[i], "CenterOfRotation", i, false);
     if (!foundI)
     {
       centerGivenAsIndex = false;
     }
 
     /** Check COR point: Returns zero when parameter was in the parameter file. */
-    const bool foundP =
-      this->m_Configuration->ReadParameter(redDimCenterOfRotationPoint[i], "CenterOfRotationPoint", i, false);
+    const bool foundP = configuration.ReadParameter(redDimCenterOfRotationPoint[i], "CenterOfRotationPoint", i, false);
     if (!foundP)
     {
       centerGivenAsPoint = false;
@@ -221,7 +223,7 @@ EulerStackTransform<TElastix>::InitializeTransform()
 
     /** FIX: why may the cop not work when using direction cosines? */
     bool UseDirectionCosines = true;
-    this->m_Configuration->ReadParameter(UseDirectionCosines, "UseDirectionCosines", 0);
+    configuration.ReadParameter(UseDirectionCosines, "UseDirectionCosines", 0);
     if (!UseDirectionCosines)
     {
       log::info(std::ostringstream{}
@@ -325,6 +327,7 @@ template <class TElastix>
 void
 EulerStackTransform<TElastix>::SetScales()
 {
+  const Configuration & configuration = itk::Deref(Superclass2::GetConfiguration());
 
   /** Create the new scales. */
   const NumberOfParametersType numberOfParameters = this->GetNumberOfParameters();
@@ -332,11 +335,11 @@ EulerStackTransform<TElastix>::SetScales()
 
   /** Check if automatic scales estimation is desired. */
   bool automaticScalesEstimation = false;
-  this->m_Configuration->ReadParameter(automaticScalesEstimation, "AutomaticScalesEstimation", 0);
+  configuration.ReadParameter(automaticScalesEstimation, "AutomaticScalesEstimation", 0);
 
   /** Check also AutomaticScalesEstimationStackTransform for backwards compatability. */
   bool automaticScalesEstimationStackTransform = false;
-  this->m_Configuration->ReadParameter(
+  configuration.ReadParameter(
     automaticScalesEstimationStackTransform, "AutomaticScalesEstimationStackTransform", 0, false);
 
   if (automaticScalesEstimationStackTransform)
@@ -382,7 +385,7 @@ EulerStackTransform<TElastix>::SetScales()
     const unsigned int numRotationParsPerDimension = ReducedSpaceDimension == 2 ? 1 : 3;
     const unsigned int numTotalParsPerDimension = ReducedSpaceDimension == 2 ? 3 : 6;
 
-    /** this->m_Configuration->ReadParameter() returns 0 if there is a value given
+    /** configuration.ReadParameter() returns 0 if there is a value given
      * in the parameter-file, and returns 1 if there is no value given in the
      * parameter-file.
      *
@@ -399,7 +402,7 @@ EulerStackTransform<TElastix>::SetScales()
     const int sizeLastDimension =
       this->GetElastix()->GetFixedImage()->GetLargestPossibleRegion().GetSize()[SpaceDimension - 1];
 
-    std::size_t count = this->m_Configuration->CountNumberOfParameterEntries("Scales");
+    std::size_t count = configuration.CountNumberOfParameterEntries("Scales");
 
     /** Check which of the above options is used. */
     if (count == 0)
@@ -421,7 +424,7 @@ EulerStackTransform<TElastix>::SetScales()
     {
       /** In this case the second option is used. */
       double scale = defaultScalingvalue;
-      this->m_Configuration->ReadParameter(scale, "Scales", 0);
+      configuration.ReadParameter(scale, "Scales", 0);
       newscales.Fill(scale);
 
       /** The non-rotation scales are set to 1.0 for all dimensions */
@@ -440,7 +443,7 @@ EulerStackTransform<TElastix>::SetScales()
       /** In this case the third option is used. */
       for (unsigned int i = 0; i < numberOfParameters; ++i)
       {
-        this->m_Configuration->ReadParameter(newscales[i], "Scales", i);
+        configuration.ReadParameter(newscales[i], "Scales", i);
       }
     }
     else
diff --git a/Components/Transforms/TranslationStackTransform/elxTranslationStackTransform.hxx b/Components/Transforms/TranslationStackTransform/elxTranslationStackTransform.hxx
index d6bc2a848..fb12d3dfe 100644
--- a/Components/Transforms/TranslationStackTransform/elxTranslationStackTransform.hxx
+++ b/Components/Transforms/TranslationStackTransform/elxTranslationStackTransform.hxx
@@ -21,6 +21,7 @@
 #include "elxTranslationStackTransform.h"
 
 #include "itkImageRegionExclusionConstIteratorWithIndex.h"
+#include <itkDeref.h>
 #include <vnl/vnl_math.h>
 
 namespace elastix
@@ -125,11 +126,12 @@ TranslationStackTransform<TElastix>::ReadFromFile()
 
   if (!this->HasITKTransformParameters())
   {
+    const Configuration & configuration = itk::Deref(Superclass2::GetConfiguration());
+
     /** Read stack-spacing, stack-origin and number of sub-transforms. */
-    this->GetConfiguration()->ReadParameter(
-      m_NumberOfSubTransforms, "NumberOfSubTransforms", this->GetComponentLabel(), 0, 0);
-    this->GetConfiguration()->ReadParameter(m_StackOrigin, "StackOrigin", this->GetComponentLabel(), 0, 0);
-    this->GetConfiguration()->ReadParameter(m_StackSpacing, "StackSpacing", this->GetComponentLabel(), 0, 0);
+    configuration.ReadParameter(m_NumberOfSubTransforms, "NumberOfSubTransforms", this->GetComponentLabel(), 0, 0);
+    configuration.ReadParameter(m_StackOrigin, "StackOrigin", this->GetComponentLabel(), 0, 0);
+    configuration.ReadParameter(m_StackSpacing, "StackSpacing", this->GetComponentLabel(), 0, 0);
 
     /** Initialize translation transform. */
     InitializeTranslationTransform();