diff --git a/KiBOM/columns.py b/KiBOM/columns.py
index ef21bcf0..782f3d04 100644
--- a/KiBOM/columns.py
+++ b/KiBOM/columns.py
@@ -14,7 +14,7 @@ class Columns:
     #default columns for groups
     COL_GRP_QUANTITY = 'Quantity'
     
-    #all available (from KiCAD) columns
+    #all available columns
     _COLUMNS_ALL = [
                COL_DESCRIPTION,
                COL_PART,
@@ -36,7 +36,7 @@ class Columns:
                 COL_FP
                 ]
                 
-    _COLUMNS_GROUPED = _COLUMNS_DEFAULT + [
+    _COLUMNS_GROUPED = [
                 COL_GRP_QUANTITY,
                 ]
     
@@ -50,6 +50,8 @@ class Columns:
 
         #make a copy of the supplied columns
         self.columns = [col for col in cols]
+        
+        self._checkDefaultColumns()
 
     def _hasColumn(self, title):
 
@@ -60,6 +62,13 @@ class Columns:
                 return True
 
         return False
+        
+    def _checkDefaultColumns(self):
+        
+        #prepend any default columns that don't exist
+        for c in self._COLUMNS_DEFAULT[::-1]:
+            if c not in self.columns:
+                self.columns = [c] + self.columns
 
     """
     Remove a column from the list. Specify either the heading or the index
diff --git a/KiBOM_GUI.py b/KiBOM_GUI.py
index 1b596fc3..868ff0e4 100644
--- a/KiBOM_GUI.py
+++ b/KiBOM_GUI.py
@@ -14,17 +14,45 @@ from KiBOM.columns import Columns
 
 #import bomfunk_netlist_reader
 
+class KiBOMColumnList(wx.CheckListBox):
+    def __init__(self, parent):
+        wx.CheckListBox.__init__(self, parent)
+        
+        self.InitColumns(Columns._COLUMNS_DEFAULT)
+        
+    def InitColumns(self, cols):
+    
+        self.Clear()
+        
+        self.AppendItems(cols)
+        
+
 class KiBOMTable(wx.grid.Grid):
     def __init__(self, parent):
         wx.grid.Grid.__init__(self,parent)
         
         #Setup default columns
-        self.SetupColumns(Columns._COLUMNS_DEFAULT)
+        self.InitColumns()
         
     #configure column headings
-    def SetupColumns(self, columns):
+    def InitColumns(self):
         
-        self.CreateGrid(0, len(columns))
+        self.CreateGrid(0, 1)
+        
+        self.SetColLabelValue(0,"Unitialized")
+        
+    """
+    Perform a complete refresh of the columns
+    """
+    def SetColumns(self, columns):
+        
+        #add in any required rows
+        if self.GetNumberCols() < len(columns):
+            self.AppendCols(len(columns) - self.GetNumberCols())
+            
+        #remove any rows as required
+        if self.GetNumberCols() > len(columns):
+            self.DeleteCols(self.GetNumberCols() - len(columns))
         
         for i,h in enumerate(columns):
             self.SetColLabelValue(i,h)
@@ -34,10 +62,14 @@ class KiBOMFrame(wx.Frame):
     def __init__(self, parent, title):
         wx.Frame.__init__(self, parent,title=title)
         
+        self.columns = Columns()
+        
         self.panel = wx.Panel(self)
         
         self.table = KiBOMTable(self.panel)
         
+        self.table.SetColumns(self.columns.columns)
+        
         #Vertical sizer that separates the "export options" (lower) from the main table and selectors
         self.hSizer = wx.BoxSizer(wx.HORIZONTAL)
         
@@ -53,6 +85,34 @@ class KiBOMFrame(wx.Frame):
         
         self.optSizer.Add(self.showHideSizer)
         
+        #list of available columns
+        self.colListSizer = wx.BoxSizer(wx.VERTICAL)
+        
+        self.colListTitle = wx.StaticText(self.panel, label="Columns:", style=wx.ALIGN_LEFT)
+        self.colListSizer.Add(self.colListTitle)
+        
+        self.colList = KiBOMColumnList(self.panel)
+        self.colListSizer.Add(self.colList)
+        
+        #buttons to move/add/delete columns
+        self.colButtons = wx.BoxSizer(wx.HORIZONTAL)
+        
+        self.moveColUp = wx.Button(self.panel, label="Up")
+        self.moveColDown = wx.Button(self.panel, label="Down")
+        self.newCol = wx.Button(self.panel, label="Add")
+        self.delCol = wx.Button(self.panel, label="Del")
+        
+        #add the buttons
+        self.colButtons.Add(self.moveColUp)
+        self.colButtons.Add(self.moveColDown)
+        self.colButtons.Add(self.delCol)
+        self.colButtons.Add(self.newCol)
+        
+        self.colListSizer.Add(self.colButtons)
+        
+        self.optSizer.Add(self.colListSizer)
+        
+        #add the main layout widgets
         self.hSizer.Add(self.optSizer)
         self.hSizer.Add(self.table, 1, wx.EXPAND)