diff --git a/Software/PC_Application/Calibration/CalStandardLoadEditDialog.ui b/Software/PC_Application/Calibration/CalStandardLoadEditDialog.ui
index b3fc7b9..6aebdf9 100644
--- a/Software/PC_Application/Calibration/CalStandardLoadEditDialog.ui
+++ b/Software/PC_Application/Calibration/CalStandardLoadEditDialog.ui
@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>349</width>
-    <height>355</height>
+    <width>344</width>
+    <height>386</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -99,23 +99,33 @@
           <widget class="SIUnitEdit" name="delay"/>
          </item>
          <item row="3" column="0">
+          <widget class="QLabel" name="label_5">
+           <property name="text">
+            <string>Offset loss [GΩ/s]: </string>
+           </property>
+          </widget>
+         </item>
+         <item row="3" column="1">
+          <widget class="SIUnitEdit" name="loss"/>
+         </item>
+         <item row="4" column="0">
           <widget class="QLabel" name="label_18">
            <property name="text">
             <string>Parallel C:</string>
            </property>
           </widget>
          </item>
-         <item row="3" column="1">
+         <item row="4" column="1">
           <widget class="SIUnitEdit" name="parC"/>
          </item>
-         <item row="4" column="0">
+         <item row="5" column="0">
           <widget class="QLabel" name="label_26">
            <property name="text">
             <string>Series L:</string>
            </property>
           </widget>
          </item>
-         <item row="4" column="1">
+         <item row="5" column="1">
           <widget class="SIUnitEdit" name="serL"/>
          </item>
         </layout>
@@ -238,7 +248,7 @@
   </connection>
  </connections>
  <buttongroups>
-  <buttongroup name="buttonGroup"/>
   <buttongroup name="buttonGroup_2"/>
+  <buttongroup name="buttonGroup"/>
  </buttongroups>
 </ui>
diff --git a/Software/PC_Application/Calibration/CalStandardOpenEditDialog.ui b/Software/PC_Application/Calibration/CalStandardOpenEditDialog.ui
index a1dd1f9..f3fdcfb 100644
--- a/Software/PC_Application/Calibration/CalStandardOpenEditDialog.ui
+++ b/Software/PC_Application/Calibration/CalStandardOpenEditDialog.ui
@@ -58,7 +58,7 @@
    <item>
     <widget class="QStackedWidget" name="stackedWidget">
      <property name="currentIndex">
-      <number>1</number>
+      <number>0</number>
      </property>
      <widget class="QWidget" name="page">
       <layout class="QFormLayout" name="formLayout">
diff --git a/Software/PC_Application/Calibration/calibration.cpp b/Software/PC_Application/Calibration/calibration.cpp
index 0bca1b2..00d23fe 100644
--- a/Software/PC_Application/Calibration/calibration.cpp
+++ b/Software/PC_Application/Calibration/calibration.cpp
@@ -1014,6 +1014,11 @@ QString Calibration::descriptiveCalName()
     return tmp;
 }
 
+bool Calibration::hasUnsavedChanges() const
+{
+    return unsavedChanges;
+}
+
 Calkit &Calibration::getKit()
 {
     return kit;
diff --git a/Software/PC_Application/Calibration/calibration.h b/Software/PC_Application/Calibration/calibration.h
index f6d8c25..2d49efa 100644
--- a/Software/PC_Application/Calibration/calibration.h
+++ b/Software/PC_Application/Calibration/calibration.h
@@ -88,7 +88,9 @@ public:
     QString getCurrentCalibrationFile();
     double getMinFreq();
     double getMaxFreq();
+
     int getNumPoints();
+    bool hasUnsavedChanges() const;
 
 public slots:
     // Call once all datapoints of the current span have been added
diff --git a/Software/PC_Application/Calibration/calkit.cpp b/Software/PC_Application/Calibration/calkit.cpp
index 07c8748..3c1ad91 100644
--- a/Software/PC_Application/Calibration/calkit.cpp
+++ b/Software/PC_Application/Calibration/calkit.cpp
@@ -293,7 +293,7 @@ Calkit Calkit::fromFile(QString filename)
             c.standards.push_back(short_f);
         }
 
-        auto load_m = new CalStandard::Load(SOLT.separate_male_female ? "Default male standard" : "Default standard", SOLT.load_m.Z0, SOLT.load_m.delay, SOLT.load_m.resistance, SOLT.load_m.Cparallel, SOLT.load_m.Lseries, SOLT.loadModelCFirst);
+        auto load_m = new CalStandard::Load(SOLT.separate_male_female ? "Default male standard" : "Default standard", SOLT.load_m.Z0, SOLT.load_m.delay, 0.0, SOLT.load_m.resistance, SOLT.load_m.Cparallel, SOLT.load_m.Lseries, SOLT.loadModelCFirst);
         if(SOLT.load_m.useMeasurements) {
             auto ts = Touchstone(1);
             ts.fromFile(SOLT.load_m.file.toStdString());
@@ -301,7 +301,7 @@ Calkit Calkit::fromFile(QString filename)
         }
         c.standards.push_back(load_m);
         if(SOLT.separate_male_female) {
-            auto load_f = new CalStandard::Load("Default female standard", SOLT.load_m.Z0, SOLT.load_f.delay, SOLT.load_f.resistance, SOLT.load_f.Cparallel, SOLT.load_f.Lseries, SOLT.loadModelCFirst);
+            auto load_f = new CalStandard::Load("Default female standard", SOLT.load_m.Z0, SOLT.load_f.delay, 0.0, SOLT.load_f.resistance, SOLT.load_f.Cparallel, SOLT.load_f.Lseries, SOLT.loadModelCFirst);
             if(SOLT.load_f.useMeasurements) {
                 auto ts = Touchstone(1);
                 ts.fromFile(SOLT.load_f.file.toStdString());
diff --git a/Software/PC_Application/Calibration/calstandard.cpp b/Software/PC_Application/Calibration/calstandard.cpp
index 270ecbf..7f731b7 100644
--- a/Software/PC_Application/Calibration/calstandard.cpp
+++ b/Software/PC_Application/Calibration/calstandard.cpp
@@ -423,7 +423,7 @@ std::complex<double> Load::toS11(double freq)
             imp_load += complex<double>(0, freq * 2 * M_PI * Lseries);
         }
         complex<double> load = (imp_load - complex<double>(50.0)) / (imp_load + complex<double>(50.0));
-        return addTransmissionLine(load, Z0, delay*1e-12, 0, freq);
+        return addTransmissionLine(load, Z0, delay*1e-12, loss*1e9, freq);
     }
 }
 
@@ -441,6 +441,7 @@ void Load::edit(std::function<void(void)> finishedCallback)
     ui->Z0->setPrecision(2);
     ui->Z0->setValue(Z0);
     ui->delay->setValue(delay);
+    ui->loss->setValue(loss);
     ui->parC->setUnit("F");
     ui->parC->setPrefixes("pnum ");
     ui->parC->setPrecision(3);
@@ -497,6 +498,7 @@ void Load::edit(std::function<void(void)> finishedCallback)
         resistance = ui->resistance->value();
         Z0 = ui->Z0->value();
         delay = ui->delay->value();
+        loss = ui->loss->value();
         Cparallel = ui->parC->value();
         Lseries = ui->serL->value();
         Cfirst = ui->C_first->isChecked();
@@ -513,6 +515,7 @@ nlohmann::json Load::toJSON()
     auto j = OnePort::toJSON();
     j["Z0"] = Z0;
     j["delay"] = delay;
+    j["loss"] = loss;
     j["resistance"] = resistance;
     j["Cparallel"] = Cparallel;
     j["Lseries"] = Lseries;
@@ -525,6 +528,7 @@ void Load::fromJSON(nlohmann::json j)
     OnePort::fromJSON(j);
     Z0 = j.value("Z0", 50.0);
     delay = j.value("delay", 0.0);
+    loss = j.value("loss", 0.0);
     resistance = j.value("resistance", 0.0);
     Cparallel = j.value("Cparallel", 0.0);
     Lseries = j.value("Lseries", 0.0);
diff --git a/Software/PC_Application/Calibration/calstandard.h b/Software/PC_Application/Calibration/calstandard.h
index c882cf8..daeed38 100644
--- a/Software/PC_Application/Calibration/calstandard.h
+++ b/Software/PC_Application/Calibration/calstandard.h
@@ -113,8 +113,8 @@ class Load : public OnePort
 {
 public:
     Load();
-    Load(QString name, double Z0, double delay, double resistance, double Cparallel, double Lseries, bool Cfirst = true)
-        : OnePort(name), Z0(Z0), delay(delay), resistance(resistance), Cparallel(Cparallel), Lseries(Lseries), Cfirst(Cfirst){}
+    Load(QString name, double Z0, double delay, double loss, double resistance, double Cparallel, double Lseries, bool Cfirst = true)
+        : OnePort(name), Z0(Z0), delay(delay), loss(loss), resistance(resistance), Cparallel(Cparallel), Lseries(Lseries), Cfirst(Cfirst){}
 
     virtual std::complex<double> toS11(double freq) override;
     virtual void edit(std::function<void(void)> finishedCallback = nullptr) override;
@@ -122,7 +122,7 @@ public:
     virtual nlohmann::json toJSON() override;
     virtual void fromJSON(nlohmann::json j) override;
 private:
-    double Z0, delay, resistance, Cparallel, Lseries;
+    double Z0, delay, loss, resistance, Cparallel, Lseries;
     bool Cfirst;
 };