diff --git a/resources/calib/sf_placeholder.stl b/resources/calib/pressure_advance_test.stl
similarity index 56%
rename from resources/calib/sf_placeholder.stl
rename to resources/calib/pressure_advance_test.stl
index e0ed7cbbbb..0df26de76a 100644
Binary files a/resources/calib/sf_placeholder.stl and b/resources/calib/pressure_advance_test.stl differ
diff --git a/resources/config.json b/resources/config.json
index 2eea04ed92..36bd134782 100644
--- a/resources/config.json
+++ b/resources/config.json
@@ -21,7 +21,7 @@
                 "FUNC_SEND_TO_SDCARD": false
             },
             "camera_resolution":["720p"],
-            "bed_temperature_limit": 100,
+            "bed_temperature_limit": 120,
             "model_id": "C11",
             "printer_type": "C11",
             "printer_thumbnail_image": "printer_thumbnail_p1p"
@@ -32,6 +32,7 @@
                 "FUNC_LOCAL_TUNNEL": false
             },
             "camera_resolution":["720p","1080p"],
+            "bed_temperature_limit": 120,
             "model_id": "BL-P002",
             "printer_type": "3DPrinter-X1",
             "printer_thumbnail_image": "printer_thumbnail"
@@ -43,6 +44,7 @@
             },
             "model_id": "BL-P001",
             "camera_resolution":["720p","1080p"],
+            "bed_temperature_limit": 120,
             "printer_type": "3DPrinter-X1-Carbon",
             "printer_thumbnail_image": "printer_thumbnail"
         }
diff --git a/src/libslic3r/calib.cpp b/src/libslic3r/calib.cpp
index f42ca95cbc..3841e382e7 100644
--- a/src/libslic3r/calib.cpp
+++ b/src/libslic3r/calib.cpp
@@ -17,6 +17,7 @@ namespace Slic3r {
         
         auto startx = (w - 100) / 2;
         auto starty = (h - count * m_space_y) / 2;
+        m_length_long = 40 + std::min(w - 120.0, 30.0);
         return print_pa_lines(startx, starty, start_pa, step_pa, count);
     }
 
@@ -31,24 +32,31 @@ namespace Slic3r {
     std::string calib_pressure_advance::print_pa_lines(double start_x, double start_y, double start_pa, double step_pa, int num) {
 
         auto& writer = mp_gcodegen->writer();
-        const double e = 0.04; // filament_mm/extrusion_mm
+        const double e_calib = 0.05; // filament_mm/extrusion_mm
+        const double e = 0.038; // filament_mm/extrusion_mm
 
         const double fast = mp_gcodegen->config().get_abs_value("outer_wall_speed") * 60.0;
         const double slow = std::max(1200.0, fast * 0.1);
         std::stringstream gcode;
         gcode << mp_gcodegen->writer().travel_to_z(0.2);
         double y_pos = start_y;
+        
+        // prime line
+        auto prime_x = std::max(start_x - 5, 0.5);
+        gcode << move_to(Vec2d(prime_x, y_pos + (num - 4) * m_space_y));
+        gcode << writer.set_speed(slow);
+        gcode << writer.extrude_to_xy(Vec2d(prime_x, y_pos + 3 * m_space_y), e_calib * m_space_y * num * 1.1);
 
         for (int i = 0; i < num; ++i) {
 
             gcode << writer.set_pressure_advance(start_pa + i * step_pa);
             gcode << move_to(Vec2d(start_x, y_pos + i * m_space_y));
             gcode << writer.set_speed(slow);
-            gcode << writer.extrude_to_xy(Vec2d(start_x + m_length_short, y_pos + i * m_space_y), e * m_length_short);
+            gcode << writer.extrude_to_xy(Vec2d(start_x + m_length_short, y_pos + i * m_space_y), e_calib * m_length_short);
             gcode << writer.set_speed(fast);
-            gcode << writer.extrude_to_xy(Vec2d(start_x + m_length_short + m_length_long, y_pos + i * m_space_y), e * m_length_long);
+            gcode << writer.extrude_to_xy(Vec2d(start_x + m_length_short + m_length_long, y_pos + i * m_space_y), e_calib * m_length_long);
             gcode << writer.set_speed(slow);
-            gcode << writer.extrude_to_xy(Vec2d(start_x + m_length_short + m_length_long + m_length_short, y_pos + i * m_space_y), e * m_length_short);
+            gcode << writer.extrude_to_xy(Vec2d(start_x + m_length_short + m_length_long + m_length_short, y_pos + i * m_space_y), e_calib * m_length_short);
 
         }
         gcode << writer.set_pressure_advance(0.0);
diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index f87c820b86..df0e3b7db3 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -7866,9 +7866,9 @@ void Plater::add_model(bool imperial_units/* = false*/,  std::string fname/* = "
 }
 
 void Plater::calib_pa(bool bowden) {
-    const auto calib_pa_name = "PressureAdvanceTest";
+    const auto calib_pa_name = "Pressure Advance Test";
     new_project(false, false, calib_pa_name);
-    add_model(false, Slic3r::resources_dir() + "/calib/sf_placeholder.stl");
+    add_model(false, Slic3r::resources_dir() + "/calib/pressure_advance_test.stl");
     wxGetApp().mainframe->select_tab(size_t(MainFrame::tp3DEditor));
 
     p->background_process.fff_print()->is_calib_mode() = bowden ? Calib_PA_Bowden : Calib_PA_DDE;
diff --git a/version.inc b/version.inc
index b8cc08c9a9..ce70f24200 100644
--- a/version.inc
+++ b/version.inc
@@ -11,4 +11,4 @@ if(NOT DEFINED BBL_INTERNAL_TESTING)
 set(BBL_INTERNAL_TESTING "1")
 endif()
 set(SLIC3R_VERSION "01.04.00.18")
-set(SoftFever_VERSION "1.4.0")
\ No newline at end of file
+set(SoftFever_VERSION "1.4.1_dev")
\ No newline at end of file