diff --git a/sleepyhead/Graphs/gSessionTimesChart.cpp b/sleepyhead/Graphs/gSessionTimesChart.cpp
index a3c30d1d..dc16decc 100644
--- a/sleepyhead/Graphs/gSessionTimesChart.cpp
+++ b/sleepyhead/Graphs/gSessionTimesChart.cpp
@@ -1,4 +1,4 @@
-/* gSessionTimesChart Implementation
+/* gSessionTimesChart Implementation
  *
  * Copyright (c) 2011-2018 Mark Watkins <mark@jedimark.net>
  *
@@ -164,7 +164,7 @@ void gSummaryChart::preCalc()
 
     for (int i=0; i<calcitems.size(); ++i) {
         SummaryCalcItem & calc = calcitems[i];
-        calc.reset(idx_end - idx_start);
+        calc.reset(idx_end - idx_start, midcalc);
     }
 }
 
@@ -403,7 +403,6 @@ void gSummaryChart::paint(QPainter &painter, gGraph &graph, const QRegion &regio
     m_minx = graph.min_x;
     m_maxx = graph.max_x;
 
-
     QDateTime date2 = QDateTime::fromMSecsSinceEpoch(m_minx, Qt::UTC);
     QDateTime enddate2 = QDateTime::fromMSecsSinceEpoch(m_maxx, Qt::UTC);
 
@@ -604,7 +603,7 @@ void gSummaryChart::paint(QPainter &painter, gGraph &graph, const QRegion &regio
 //                    painter.fillRect(rec, slice.brush);
                     outlines.append(rec);
                 } else {
-                    painter.fillRect(rec, QBrush(brighten(color,1.25)));
+                    painter.fillRect(rec, brighten(color, 1.25));
                     outlines.append(rec);
                 }
 
@@ -683,7 +682,7 @@ void gUsageChart::preCalc()
     incompdays = 0;
 
     SummaryCalcItem & calc = calcitems[0];
-    calc.reset(idx_end - idx_start);
+    calc.reset(idx_end - idx_start, midcalc);
 }
 
 void gUsageChart::customCalc(Day *, QVector<SummaryChartSlice> &list)
@@ -739,14 +738,14 @@ void gSessionTimesChart::preCalc() {
     total_length = 0;
     SummaryCalcItem  & calc = calcitems[0];
 
-    calc.reset((idx_end - idx_start) * 6);
+    calc.reset((idx_end - idx_start) * 6, midcalc);
 
     SummaryCalcItem  & calc1 = calcitems[1];
 
-    calc1.reset(idx_end - idx_start);
+    calc1.reset(idx_end - idx_start, midcalc);
 
     SummaryCalcItem  & calc2 = calcitems[2];
-    calc2.reset(idx_end - idx_start);
+    calc2.reset(idx_end - idx_start, midcalc);
 }
 
 void gSessionTimesChart::customCalc(Day *, QVector<SummaryChartSlice> & slices) {
diff --git a/sleepyhead/Graphs/gSessionTimesChart.h b/sleepyhead/Graphs/gSessionTimesChart.h
index b1248b2b..0494833a 100644
--- a/sleepyhead/Graphs/gSessionTimesChart.h
+++ b/sleepyhead/Graphs/gSessionTimesChart.h
@@ -1,4 +1,4 @@
-/* gSessionTimesChart Header
+/* gSessionTimesChart Header
  *
  * Copyright (C) 2011-2018 Mark Watkins <mark@jedimark.net>
  *
@@ -91,8 +91,8 @@ struct SummaryCalcItem {
         max = qMax(max, value);
     }
 
-    void reset(int reserve) {
-        midcalc = p_profile->general->prefCalcMiddle();
+    void reset(int reserve, short mc) {
+        midcalc = mc;
 
         wavg_sum = 0;
         avg_sum = 0;
diff --git a/sleepyhead/Graphs/gSummaryChart.cpp b/sleepyhead/Graphs/gSummaryChart.cpp
index d6b8c4e6..793cd6aa 100644
--- a/sleepyhead/Graphs/gSummaryChart.cpp
+++ b/sleepyhead/Graphs/gSummaryChart.cpp
@@ -1,4 +1,4 @@
-/* gSummaryChart Implementation
+/* gSummaryChart Implementation
  *
  * Copyright (c) 2011-2018 Mark Watkins <mark@jedimark.net>
  *
@@ -571,6 +571,7 @@ void SummaryChart::paint(QPainter &painter, gGraph &w, const QRegion &region)
 
     float lineThickness = AppSetting->lineThickness();
 
+
     for (qint64 Q = minx; Q <= maxx + ms_per_day; Q += ms_per_day) {
         zd = Q / ms_per_day;
         d = m_values.find(zd);
diff --git a/sleepyhead/SleepLib/schema.cpp b/sleepyhead/SleepLib/schema.cpp
index 44afa38c..6d84ddb9 100644
--- a/sleepyhead/SleepLib/schema.cpp
+++ b/sleepyhead/SleepLib/schema.cpp
@@ -403,7 +403,7 @@ void init()
     schema::channel.add(GRP_CPAP, new Channel(CPAP_FLG               = 0x1113, WAVEFORM,   MT_CPAP,  SESSION, "FLG",
                         QObject::tr("Flow Limitation"),
                         QObject::tr("Graph showing severity of flow limitations"),   QObject::tr("Flow Limit."),
-                        STR_UNIT_Severity,      DEFAULT,    QColor("dark gray")));
+                        STR_UNIT_Severity,      DEFAULT,    QColor("#585858")));
 
     schema::channel.add(GRP_CPAP, new Channel(CPAP_TgMV              = 0x1114, WAVEFORM,  MT_CPAP,   SESSION,
                         "TgMV",              QObject::tr("Target Minute Ventilation"),