diff --git a/etg/colour.py b/etg/colour.py
index 10d0a455..21da8581 100644
--- a/etg/colour.py
+++ b/etg/colour.py
@@ -202,9 +202,8 @@ def run():
                     return 0;
                 // ensure all the items in the sequence are numbers
                 for (int idx=0; idx<len; idx+=1) {
-                    PyObject* o = PySequence_ITEM(sipPy, idx);
+                    PyObject* o = PySequence_Fast_GET_ITEM(sipPy, idx);
                     bool isNum = PyNumber_Check(o);
-                    Py_DECREF(o);
                     if (!isNum)
                         return 0;
                 }
@@ -255,23 +254,19 @@ def run():
             }
         }
         // Is it a 3 or 4 element sequence?
-        else if (PySequence_Check(sipPy)) {
-            size_t len = PyObject_Length(sipPy);
+        else if (PyTuple_Check(sipPy) || PyList_Check(sipPy)) {
+            size_t len = PySequence_Size(sipPy);
 
-            PyObject* o1 = PySequence_GetItem(sipPy, 0);
-            PyObject* o2 = PySequence_GetItem(sipPy, 1);
-            PyObject* o3 = PySequence_GetItem(sipPy, 2);
+            PyObject* o1 = PySequence_Fast_GET_ITEM(sipPy, 0);
+            PyObject* o2 = PySequence_Fast_GET_ITEM(sipPy, 1);
+            PyObject* o3 = PySequence_Fast_GET_ITEM(sipPy, 2);
             if (len == 3)
                 *sipCppPtr = new wxColour(wxPyInt_AsLong(o1), wxPyInt_AsLong(o2), wxPyInt_AsLong(o3));
             else {
-                PyObject* o4 = PySequence_GetItem(sipPy, 3);
+                PyObject* o4 = PySequence_Fast_GET_ITEM(sipPy, 3);
                 *sipCppPtr = new wxColour(wxPyInt_AsLong(o1), wxPyInt_AsLong(o2), wxPyInt_AsLong(o3),
                                           wxPyInt_AsLong(o4));
-                Py_DECREF(o4);
             }
-            Py_DECREF(o1);
-            Py_DECREF(o2);
-            Py_DECREF(o3);
             return sipGetState(sipTransferObj);
         }
 
diff --git a/etgtools/tweaker_tools.py b/etgtools/tweaker_tools.py
index ed83f6f9..999ce63f 100644
--- a/etgtools/tweaker_tools.py
+++ b/etgtools/tweaker_tools.py
@@ -628,12 +628,10 @@ def convertTwoIntegersTemplate(CLASS):
 
        if ((PyTuple_Check(sipPy) || PyList_Check(sipPy)) && PySequence_Size(sipPy) == 2) {{
            int rval = 1;
-           PyObject* o1 = PySequence_ITEM(sipPy, 0);
-           PyObject* o2 = PySequence_ITEM(sipPy, 1);
+           PyObject* o1 = PySequence_Fast_GET_ITEM(sipPy, 0);
+           PyObject* o2 = PySequence_Fast_GET_ITEM(sipPy, 1);
            if (!PyNumber_Check(o1) || !PyNumber_Check(o2))
                rval = 0;
-           Py_DECREF(o1);
-           Py_DECREF(o2);
            return rval;
        }}
        return 0;
@@ -648,11 +646,9 @@ def convertTwoIntegersTemplate(CLASS):
     }}
 
     // or create a new instance
-    PyObject* o1 = PySequence_ITEM(sipPy, 0);
-    PyObject* o2 = PySequence_ITEM(sipPy, 1);
+    PyObject* o1 = PySequence_Fast_GET_ITEM(sipPy, 0);
+    PyObject* o2 = PySequence_Fast_GET_ITEM(sipPy, 1);
     *sipCppPtr = new {CLASS}(wxPyInt_AsLong(o1), wxPyInt_AsLong(o2));
-    Py_DECREF(o1);
-    Py_DECREF(o2);
     return SIP_TEMPORARY;
     """.format(**locals())
 
@@ -668,16 +664,12 @@ def convertFourIntegersTemplate(CLASS):
 
         if ((PyTuple_Check(sipPy) || PyList_Check(sipPy)) && PySequence_Size(sipPy) == 4) {{
             int rval = 1;
-            PyObject* o1 = PySequence_ITEM(sipPy, 0);
-            PyObject* o2 = PySequence_ITEM(sipPy, 1);
-            PyObject* o3 = PySequence_ITEM(sipPy, 2);
-            PyObject* o4 = PySequence_ITEM(sipPy, 3);
+            PyObject* o1 = PySequence_Fast_GET_ITEM(sipPy, 0);
+            PyObject* o2 = PySequence_Fast_GET_ITEM(sipPy, 1);
+            PyObject* o3 = PySequence_Fast_GET_ITEM(sipPy, 2);
+            PyObject* o4 = PySequence_Fast_GET_ITEM(sipPy, 3);
             if (!PyNumber_Check(o1) || !PyNumber_Check(o2) || !PyNumber_Check(o3) || !PyNumber_Check(o4))
                 rval = 0;
-            Py_DECREF(o1);
-            Py_DECREF(o2);
-            Py_DECREF(o3);
-            Py_DECREF(o4);
             return rval;
         }}
         return 0;
@@ -691,14 +683,12 @@ def convertFourIntegersTemplate(CLASS):
         return 0; // not a new instance
     }}
     // or create a new instance
-    PyObject* o1 = PySequence_ITEM(sipPy, 0);
-    PyObject* o2 = PySequence_ITEM(sipPy, 1);
-    PyObject* o3 = PySequence_ITEM(sipPy, 2);
-    PyObject* o4 = PySequence_ITEM(sipPy, 3);
+    PyObject* o1 = PySequence_Fast_GET_ITEM(sipPy, 0);
+    PyObject* o2 = PySequence_Fast_GET_ITEM(sipPy, 1);
+    PyObject* o3 = PySequence_Fast_GET_ITEM(sipPy, 2);
+    PyObject* o4 = PySequence_Fast_GET_ITEM(sipPy, 3);
     *sipCppPtr = new {CLASS}(wxPyInt_AsLong(o1), wxPyInt_AsLong(o2),
                              wxPyInt_AsLong(o3), wxPyInt_AsLong(o4));
-    Py_DECREF(o1);
-    Py_DECREF(o2);
     return SIP_TEMPORARY;
     """.format(**locals())
 
@@ -715,12 +705,10 @@ def convertTwoDoublesTemplate(CLASS):
 
         if ((PyTuple_Check(sipPy) || PyList_Check(sipPy)) && PySequence_Size(sipPy) == 2) {{
             int rval = 1;
-            PyObject* o1 = PySequence_ITEM(sipPy, 0);
-            PyObject* o2 = PySequence_ITEM(sipPy, 1);
+            PyObject* o1 = PySequence_Fast_GET_ITEM(sipPy, 0);
+            PyObject* o2 = PySequence_Fast_GET_ITEM(sipPy, 1);
             if (!PyNumber_Check(o1) || !PyNumber_Check(o2))
                 rval = 0;
-            Py_DECREF(o1);
-            Py_DECREF(o2);
             return rval;
         }}
         return 0;
@@ -735,11 +723,9 @@ def convertTwoDoublesTemplate(CLASS):
     }}
 
     // or create a new instance
-    PyObject* o1 = PySequence_ITEM(sipPy, 0);
-    PyObject* o2 = PySequence_ITEM(sipPy, 1);
+    PyObject* o1 = PySequence_Fast_GET_ITEM(sipPy, 0);
+    PyObject* o2 = PySequence_Fast_GET_ITEM(sipPy, 1);
     *sipCppPtr = new {CLASS}(PyFloat_AsDouble(o1), PyFloat_AsDouble(o2));
-    Py_DECREF(o1);
-    Py_DECREF(o2);
     return SIP_TEMPORARY;
     """.format(**locals())
 
@@ -755,16 +741,12 @@ def convertFourDoublesTemplate(CLASS):
 
         if ((PyTuple_Check(sipPy) || PyList_Check(sipPy)) && PySequence_Size(sipPy) == 4) {{
             int rval = 1;
-            PyObject* o1 = PySequence_ITEM(sipPy, 0);
-            PyObject* o2 = PySequence_ITEM(sipPy, 1);
-            PyObject* o3 = PySequence_ITEM(sipPy, 2);
-            PyObject* o4 = PySequence_ITEM(sipPy, 3);
+            PyObject* o1 = PySequence_Fast_GET_ITEM(sipPy, 0);
+            PyObject* o2 = PySequence_Fast_GET_ITEM(sipPy, 1);
+            PyObject* o3 = PySequence_Fast_GET_ITEM(sipPy, 2);
+            PyObject* o4 = PySequence_Fast_GET_ITEM(sipPy, 3);
             if (!PyNumber_Check(o1) || !PyNumber_Check(o2) || !PyNumber_Check(o3) || !PyNumber_Check(o4))
                 rval = 0;
-            Py_DECREF(o1);
-            Py_DECREF(o2);
-            Py_DECREF(o3);
-            Py_DECREF(o4);
             return rval;
         }}
         return 0;
@@ -779,14 +761,12 @@ def convertFourDoublesTemplate(CLASS):
     }}
 
     // or create a new instance
-    PyObject* o1 = PySequence_ITEM(sipPy, 0);
-    PyObject* o2 = PySequence_ITEM(sipPy, 1);
-    PyObject* o3 = PySequence_ITEM(sipPy, 2);
-    PyObject* o4 = PySequence_ITEM(sipPy, 3);
+    PyObject* o1 = PySequence_Fast_GET_ITEM(sipPy, 0);
+    PyObject* o2 = PySequence_Fast_GET_ITEM(sipPy, 1);
+    PyObject* o3 = PySequence_Fast_GET_ITEM(sipPy, 2);
+    PyObject* o4 = PySequence_Fast_GET_ITEM(sipPy, 3);
     *sipCppPtr = new {CLASS}(PyFloat_AsDouble(o1), PyFloat_AsDouble(o2),
-    PyFloat_AsDouble(o3), PyFloat_AsDouble(o4));
-    Py_DECREF(o1);
-    Py_DECREF(o2);
+                             PyFloat_AsDouble(o3), PyFloat_AsDouble(o4));
     return SIP_TEMPORARY;
     """.format(**locals())
 
diff --git a/src/wxpy_api.sip b/src/wxpy_api.sip
index fe59c72d..c94c2aa8 100644
--- a/src/wxpy_api.sip
+++ b/src/wxpy_api.sip
@@ -174,6 +174,7 @@ static void i_wxPyEndBlockThreads(wxPyBlock_t blocked)
 
 //--------------------------------------------------------------------------
 // Commonly used helpers for converting small sequences of numbers
+// TODO: Are these still needed?
 
 // A helper for converting a 2 element sequence to a pair of integers
 static bool i_wxPy2int_seq_helper(PyObject* source, int* i1, int* i2)