diff --git a/pychord/chord.py b/pychord/chord.py
index 8058e91..68cfdea 100644
--- a/pychord/chord.py
+++ b/pychord/chord.py
@@ -89,6 +89,9 @@ def components(self, visible=True):
         :rtype: list[(str or int)]
         :return component notes of chord
         """
+        if self._on:
+            self._quality.append_on_chord(self.on, self.root)
+
         return self._quality.get_components(root=self._root, visible=visible)
 
     def _parse(self, chord):
diff --git a/pychord/quality.py b/pychord/quality.py
index 5dfc816..8488c2a 100644
--- a/pychord/quality.py
+++ b/pychord/quality.py
@@ -40,8 +40,10 @@ def get_components(self, root='C', visible=False):
         """
         root_val = note_to_val(root)
         components = [v + root_val for v in self.components]
+
         if visible:
             components = [val_to_note(c, scale=root) for c in components]
+
         return components
 
     def append_on_chord(self, on_chord, root):
@@ -56,20 +58,19 @@ def append_on_chord(self, on_chord, root):
         """
         root_val = note_to_val(root)
         on_chord_val = note_to_val(on_chord) - root_val
-        for idx, val in enumerate(self.components):
+
+        lista = list(self.components)
+        for idx, val in enumerate(lista):
             if val % 12 == on_chord_val:
-                scale = val / 12
-                self._rotate_components(idx, scale)
+                self.components.remove(val)
                 break
+
         if on_chord_val > root_val:
             on_chord_val -= 12
+
         if on_chord_val not in self.components:
             self.components.insert(0, on_chord_val)
 
-    def _rotate_components(self, stop_idx, scale):
-        for idx, val in enumerate(self.components[:stop_idx]):
-            self.components[idx] += (scale + 1) * 12
-
     def append_note(self, note, root, scale=0):
         """ Append a note to quality
 
diff --git a/test/test_component.py b/test/test_component.py
index eba4773..876c955 100644
--- a/test/test_component.py
+++ b/test/test_component.py
@@ -36,6 +36,13 @@ def test_aug_chord(self):
         com1 = c.components(visible=True)
         self.assertEqual(com1, ["E", "G#", "C"])
 
+    def test_slash_chord(self):
+        c = Chord("CM9/D")
+        com0 = c.components(visible=False)
+        self.assertEqual(com0, [-10, 0, 4, 7, 11])
+        com1 = c.components(visible=True)
+        self.assertEqual(com1, ["D", "C", "E", "G", "B"])
+
     def test_sus4_chord(self):
         c = Chord("Fsus4")
         com0 = c.components(visible=False)