diff --git a/reflowctl/edge_widget.py b/reflowctl/edge_widget.py
index 2674459..8491d45 100644
--- a/reflowctl/edge_widget.py
+++ b/reflowctl/edge_widget.py
@@ -11,6 +11,11 @@ class Edge(QtCore.QObject):
         self.duration = duration
         self.rate = rate
 
+    def contains(self, temp_level):
+        return (
+          (self.from_tl.temp < temp_level.temp < self.to_tl.temp) or
+          (self.from_tl.temp > temp_level.temp > self.to_tl.temp))
+
     def __repr__(self):
         return "Edge(%r, %r, %r, %r)" % (self.from_tl, self.to_tl, self.duration, self.rate)
 
@@ -141,19 +146,33 @@ class ConstraintWidget(QtGui.QWidget):
         print self.temp_level_added
         self.edge_changed.emit()
 
-    def temp_level_added(self, old_tl, new_tl):
+    def temp_level_added(self, new_tl):
         print self.temp_level_added, len(self.edge_model.edges)
-        new_edge = None
+        new_edges = list()
         ix = 0
-        for ix, edge in enumerate(self.edge_model.edges):
-            print ix, edge
-            if edge.from_tl == old_tl:
+        batch = list()
+        for edge in self.edge_model.edges:
+            if edge.contains(new_tl):
+                batch.append(edge)
+
+        for edge in batch:
+            if edge.from_tl < new_tl:
                 duration = None if edge.duration is None else edge.duration / 2
                 new_edge = Edge(new_tl, edge.to_tl, duration, edge.rate)
                 edge.duration = duration
                 edge.to_tl = new_tl
-                break
-        self.edge_model.edges.insert(ix+1, new_edge)
-        self.edge_model.reset()
-        print "end", self.temp_level_added
+                ix = self.edge_model.edges.index(edge)
+                self.edge_model.edges.insert(ix+1, new_edge)
+            else:
+                duration = None if edge.duration is None else edge.duration / 2
+                new_edge = Edge(new_tl, edge.to_tl, duration, edge.rate)
+                edge.duration = duration
+                edge.to_tl = new_tl
+                ix = self.edge_model.edges.index(edge)
+                self.edge_model.edges.insert(ix+1, new_edge)
 
+        #for i in new_edges:
+            #print repr(i)
+        #for edge, new_edge in new_edges:
+
+        self.edge_model.reset()
diff --git a/reflowctl/reflowctl_gui.py b/reflowctl/reflowctl_gui.py
index 5303487..24f2626 100755
--- a/reflowctl/reflowctl_gui.py
+++ b/reflowctl/reflowctl_gui.py
@@ -100,12 +100,9 @@ class Plotter(FigureCanvas):
             self.y = list()
 
             try:
-                (self.x, self.y, self.xmin, self.xmax, self.ymin, self.ymax,
-                self.used, self.unused) = self.solder.calc_profile()
+                (self.x, self.y, self.xmin, self.xmax, self.ymin, self.ymax) = self.solder.calc_profile()
             except ValueError:
-                (self.x, self.y, self.xmin, self.xmax, self.ymin, self.ymax,
-                self.used, self.unused) = ([], [], 0., 300., 0., 300., [],
-                                          self.solder.temp_levels)
+                (self.x, self.y, self.xmin, self.xmax, self.ymin, self.ymax) = ([], [], 0., 300., 0., 300.)
 
             self.plot_data.set_xdata(self.x)
             self.plot_data.set_ydata(self.y)
@@ -363,6 +360,8 @@ class ApplicationWindow(QtGui.QMainWindow):
 
         self.plotter_splitter.addWidget(self.plotter)
         self.plotter_splitter.addWidget(self.profile_log)
+        self.plotter_splitter.setStretchFactor(0, 8)
+        self.plotter_splitter.setStretchFactor(1, 2)
 
         self.splitter.addWidget(self.settings_widget)
         self.splitter.addWidget(self.controls_widget)
@@ -374,7 +373,7 @@ class ApplicationWindow(QtGui.QMainWindow):
         self.setCentralWidget(self.splitter)
 
         self.statusBar().showMessage("Reflow GORE!1!", 10000)
-        self.plotter.solder_changed()
+        self.plotter.update_figure()
 
     def getPlotter(self):
         return self.plotter
@@ -386,6 +385,8 @@ class ApplicationWindow(QtGui.QMainWindow):
             self.constraint_widget.setData(solder)
             self.plotter.setData(solder)
             solder.log_message.connect(self.profile_log.setPlainText)
+            if not self.plotter.started:
+                self.plotter.update_figure()
 
     def edge_picked(self, ix):
         if self.tab_widget.currentIndex() != 1:
diff --git a/reflowctl/solder.py b/reflowctl/solder.py
index 82d2461..584f101 100644
--- a/reflowctl/solder.py
+++ b/reflowctl/solder.py
@@ -50,13 +50,7 @@ class Solder(QtCore.QObject):
                 return i
         return None
 
-    #def get_temp_level(self, ix):
-        #assert isinstance(ix, int)
-        #return self.temp_levels[ix]
-
-
     def calc_profile(self):
-        print self.calc_profile
         self.log = list()
         x = list()
         y = list()
@@ -69,16 +63,17 @@ class Solder(QtCore.QObject):
                 return time + edge.duration
             elif edge.rate:
                 return time + (edge.to_tl.temp - edge.from_tl.temp) / edge.rate
+            else:
+                raise Exception("edge %r has neither duration nor rate set" % edge)
 
         for _edge in self.edges:
-            x.append(time)
-            y.append(_edge.from_tl.temp)
+            x.append(float(time))
+            y.append(float(_edge.from_tl.temp))
             time = calc(_edge)
 
         x.append(time)
         y.append(_edge.to_tl.temp)
-        print "end", self.calc_profile
-        return array(map(float, x)), array(map(float, y)), min(x), max(x), min(y), max(y), set(), set()
+        return array(x), array(y), min(x), max(x), min(y), max(y)
 
 
     @staticmethod
@@ -223,8 +218,8 @@ class SolderWidget(QtGui.QWidget):
         self.solder_controls = AddRemoveWidget(self)
 
         layout = QtGui.QHBoxLayout(self)
-        layout.addWidget(self.solder_view, 3)
-        layout.addWidget(self.solder_controls, 1)
+        layout.addWidget(self.solder_view)
+        layout.addWidget(self.solder_controls)
 
         self.connect(
             self.solder_controls.add_button,
diff --git a/reflowctl/solder_types/lead_noclean.xml b/reflowctl/solder_types/lead_noclean.xml
index 46e1c98..615f2c4 100644
--- a/reflowctl/solder_types/lead_noclean.xml
+++ b/reflowctl/solder_types/lead_noclean.xml
@@ -1,2 +1,2 @@
 <?xml version='1.0' encoding='UTF-8'?>
-<xml><solder_type description="" name="lead noclean"><state name="environment temp" temperature="$ENV" /><state name="preheat start" temperature="150" /><state name="preheat end" temperature="185" /><state name="tal" temperature="230" /><state name="peak" temperature="260" /><edge duration="None" from="environment temp" rate="1.0" to="preheat start" /><edge duration="100.0" from="preheat start" rate="1.0" to="preheat end" /><edge duration="None" from="preheat end" rate="1.0" to="tal" /><edge duration="50.0" from="tal" rate="1.0" to="peak" /><edge duration="50.0" from="peak" rate="-1.0" to="tal" /><edge duration="None" from="tal" rate="-2.0" to="preheat end" /><edge duration="None" from="preheat end" rate="-2.0" to="preheat start" /><edge duration="None" from="preheat start" rate="-2.0" to="environment temp" /></solder_type></xml>
\ No newline at end of file
+<xml><solder_type description="" name="lead noclean"><state name="environment temp" temperature="$ENV" /><state name="preheat start" temperature="150" /><state name="preheat end" temperature="185" /><state name="tal" temperature="230" /><state name="peak-5°C" temperature="255" /><state name="peak" temperature="260" /><edge duration="None" from="environment temp" rate="1.0" to="preheat start" /><edge duration="100.0" from="preheat start" rate="1.0" to="preheat end" /><edge duration="None" from="preheat end" rate="1.0" to="tal" /><edge duration="25.0" from="tal" rate="1.0" to="peak-5°C" /><edge duration="25.0" from="peak-5°C" rate="1.0" to="peak" /><edge duration="25.0" from="peak" rate="-1.0" to="peak-5°C" /><edge duration="25.0" from="peak-5°C" rate="-1.0" to="tal" /><edge duration="None" from="tal" rate="-3.0" to="preheat end" /><edge duration="None" from="preheat end" rate="-2.0" to="preheat start" /><edge duration="None" from="preheat start" rate="-2.0" to="environment temp" /></solder_type></xml>
\ No newline at end of file
diff --git a/reflowctl/temp_level.py b/reflowctl/temp_level.py
index 3d1bb53..79f84c3 100644
--- a/reflowctl/temp_level.py
+++ b/reflowctl/temp_level.py
@@ -140,7 +140,7 @@ class TempLevelModel(QtCore.QAbstractTableModel):
         if index.isValid() and role == QtCore.Qt.EditRole:
             col = index.column()
             if col == 0:
-                self.temp_levels[index.row()].name = str(variant.toString())
+                self.temp_levels[index.row()].name = unicode(variant.toString())
             elif col == 1:
                 temp, res = variant.toInt()
                 tl = self.temp_levels[index.row()]
@@ -195,7 +195,7 @@ class TempLevelModel(QtCore.QAbstractTableModel):
 
 class TempLevelWidget(QtGui.QWidget):
     temp_level_removed = QtCore.pyqtSignal(TempLevel)
-    temp_level_added = QtCore.pyqtSignal(TempLevel, TempLevel)
+    temp_level_added = QtCore.pyqtSignal(TempLevel)
     temp_levels_changed = QtCore.pyqtSignal()
     solder_changed = QtCore.pyqtSignal()
 
@@ -260,7 +260,7 @@ class TempLevelWidget(QtGui.QWidget):
         self.temp_level_view.setCurrentIndex(self.temp_level_model.index(index.row() + 1, 0))
         self.temp_levels_changed.emit()
         print "TempLevelWidget.add_temp_level 1", old_tl, new_tl
-        self.temp_level_added.emit(old_tl, new_tl)
+        self.temp_level_added.emit(new_tl)
         print "TempLevelWidget.add_temp_level 2"