diff --git a/SkeinPyPy_NewUI/newui/configBase.py b/SkeinPyPy_NewUI/newui/configBase.py
index 0f939de3..f1a66421 100644
--- a/SkeinPyPy_NewUI/newui/configBase.py
+++ b/SkeinPyPy_NewUI/newui/configBase.py
@@ -1,7 +1,7 @@
 from __future__ import absolute_import
 import __init__
 
-import wx, os, platform, types
+import wx, os, sys, platform, types
 
 from fabmetheus_utilities import settings
 
@@ -18,7 +18,7 @@ class configWindowBase(wx.Frame):
 		super(configWindowBase, self).__init__(None, title=title)
 		
 		self.settingControlList = []
-
+		
 		#Create the popup window
 		self.popup = wx.PopupWindow(self, wx.BORDER_SIMPLE)
 		self.popup.SetBackgroundColour(wx.SystemSettings.GetColour(wx.SYS_COLOUR_INFOBK))
@@ -27,7 +27,10 @@ class configWindowBase(wx.Frame):
 		self.popup.sizer = wx.BoxSizer()
 		self.popup.sizer.Add(self.popup.text, flag=wx.EXPAND|wx.ALL, border=1)
 		self.popup.SetSizer(self.popup.sizer)
-
+		
+		self.popup.Bind(wx.EVT_MOTION, self.OnPopupHide)
+		self.popup.text.Bind(wx.EVT_MOTION, self.OnPopupHide)
+	
 	def CreateConfigTab(self, nb, name):
 		leftConfigPanel, rightConfigPanel, configPanel = self.CreateConfigPanel(nb)
 		nb.AddPage(configPanel, name)
@@ -48,7 +51,7 @@ class configWindowBase(wx.Frame):
 		leftConfigPanel.main = self
 		rightConfigPanel.main = self
 		return leftConfigPanel, rightConfigPanel, configPanel
-	
+
 	def OnPopupDisplay(self, setting):
 		self.popup.setting = setting
 		self.UpdatePopup(setting)
@@ -125,6 +128,12 @@ class SettingRow():
 		self.ctrl.Bind(wx.EVT_ENTER_WINDOW, lambda e: panel.main.OnPopupDisplay(self))
 		self.ctrl.Bind(wx.EVT_LEAVE_WINDOW, panel.main.OnPopupHide)
 		
+		#MacOS X doesn't get EVT_ENTER/LEAVE_WINDOW for controls. So we use the motion event then. This results in slightly less good popups, but it works.
+		if sys.platform == 'darwin':
+			self.ctrl.Bind(wx.EVT_MOTION, lambda e: panel.main.OnPopupDisplay(self))
+		
+		self.defaultBGColour = self.ctrl.GetBackgroundColour()
+		
 		panel.main.settingControlList.append(self)
 		
 		sizer.Add(self.label, (x,y), flag=wx.ALIGN_CENTER_VERTICAL)
@@ -151,7 +160,7 @@ class SettingRow():
 		elif result == validators.WARNING:
 			self.ctrl.SetBackgroundColour('Yellow')
 		else:
-			self.ctrl.SetBackgroundColour(wx.NullColour)
+			self.ctrl.SetBackgroundColour(self.defaultBGColour)
 		self.ctrl.Refresh()
 
 		self.validationMsg = '\n'.join(msgs)
diff --git a/SkeinPyPy_NewUI/newui/mainWindow.py b/SkeinPyPy_NewUI/newui/mainWindow.py
index e1cc265b..960a0ff6 100644
--- a/SkeinPyPy_NewUI/newui/mainWindow.py
+++ b/SkeinPyPy_NewUI/newui/mainWindow.py
@@ -110,6 +110,7 @@ class mainWindow(configBase.configWindowBase):
 		configBase.TitleRow(right, "Filament")
 		c = configBase.SettingRow(right, "Diameter (mm)", 'filament_diameter', '2.89', 'Diameter of your filament, as accurately as possible.\nIf you cannot measure this value you will have to callibrate it, a higher number means less extrusion, a smaller number generates more extrusion.')
 		validators.validFloat(c, 1.0)
+		validators.warningAbove(c, 3.5, "Are you sure your filament is that thick? Normal filament is around 3mm or 1.75mm.")
 		c = configBase.SettingRow(right, "Packing Density", 'filament_density', '1.00', 'Packing density of your filament. This should be 1.00 for PLA and 0.85 for ABS')
 		validators.validFloat(c, 0.5, 1.5)
 		
@@ -239,6 +240,7 @@ class mainWindow(configBase.configWindowBase):
 
 	def OnFirstRunWizard(self, e):
 		configWizard.configWizard()
+		self.updateProfileToControls()
 
 	def OnLoadSTL(self, e):
 		dlg=wx.FileDialog(self, "Open file to print", self.lastPath, style=wx.FD_OPEN|wx.FD_FILE_MUST_EXIST)
diff --git a/SkeinPyPy_NewUI/newui/preview3d.py b/SkeinPyPy_NewUI/newui/preview3d.py
index f3f3ade8..537ba329 100644
--- a/SkeinPyPy_NewUI/newui/preview3d.py
+++ b/SkeinPyPy_NewUI/newui/preview3d.py
@@ -113,6 +113,7 @@ class previewPanel(wx.Panel):
 		triangleMesh.origonalVertexes = list(triangleMesh.vertexes)
 		for i in xrange(0, len(triangleMesh.origonalVertexes)):
 			triangleMesh.origonalVertexes[i] = triangleMesh.origonalVertexes[i].copy()
+		triangleMesh.getMinimumZ()
 		self.triangleMesh = triangleMesh
 		self.gcode = None
 		self.updateModelTransform()
diff --git a/SkeinPyPy_NewUI/skeinforge_application/alterations/start.gcode b/SkeinPyPy_NewUI/skeinforge_application/alterations/start.gcode
index 563b42f5..7db5699c 100644
--- a/SkeinPyPy_NewUI/skeinforge_application/alterations/start.gcode
+++ b/SkeinPyPy_NewUI/skeinforge_application/alterations/start.gcode
@@ -9,7 +9,6 @@ G28 Z0     ;move Z to min endstops
 ; height of the nozzle in mm. This can take some messing around
 ; with to get just right...
 G92 X0 Y0 Z0 E0 ;reset software position to front/left/z=0.0
-G21
 G1 Z15.0 F400  ;move the platform down 15mm
 G92 E0         ;zero the extruded length
 
diff --git a/SkeinPyPy_NewUI/skeinforge_application/skeinforge_plugins/craft_plugins/joris.py b/SkeinPyPy_NewUI/skeinforge_application/skeinforge_plugins/craft_plugins/joris.py
index 42c6856c..cd6ba5bf 100644
--- a/SkeinPyPy_NewUI/skeinforge_application/skeinforge_plugins/craft_plugins/joris.py
+++ b/SkeinPyPy_NewUI/skeinforge_application/skeinforge_plugins/craft_plugins/joris.py
@@ -134,7 +134,6 @@ class JorisSkein:
 		if len(splitLine) < 1:
 			return
 		firstWord = splitLine[0]
-		print 'joris:' + firstWord
 		if firstWord == 'G1':
 			self.feedRateMinute = gcodec.getFeedRateMinute(self.feedRateMinute, splitLine)
 			location = gcodec.getLocationFromSplitLine(self.oldLocation, splitLine)