diff --git a/src/drivers/simplix/simplix_36GP/36GP-bugatti/default.xml b/src/drivers/simplix/simplix_36GP/36GP-bugatti/default.xml
index c51f17ac2..23722c34d 100644
--- a/src/drivers/simplix/simplix_36GP/36GP-bugatti/default.xml
+++ b/src/drivers/simplix/simplix_36GP/36GP-bugatti/default.xml
@@ -20,7 +20,7 @@
 		<attnum name="accel out" min="0" max="1" val="0"/>
 		<attnum name="brake limit" val="-7.5"/>
 		<attnum name="scale brake" min="0" max="1" val="0.85"/>
-		<attnum name="scale mu" min="0" max="2" val="0.95"/>
+		<attnum name="scale mu" min="0" max="2" val="0.91"/>
 		<attnum name="scale steer" min="0.1" max="2.0" val="1.2"/>
 		<attnum name="tcl slip" min="1.0" max="10.0" val="3.3"/>
 	</section>
diff --git a/src/drivers/simplix/simplix_36GP/tracks/Corkscrew.xml b/src/drivers/simplix/simplix_36GP/tracks/Corkscrew.xml
index 9e82e40be..1a4de8d35 100644
--- a/src/drivers/simplix/simplix_36GP/tracks/Corkscrew.xml
+++ b/src/drivers/simplix/simplix_36GP/tracks/Corkscrew.xml
@@ -2,7 +2,7 @@
 <!-- 
     file          : Corkscrew.xml
     created       : 28 Mar 2008 
-    last modified : 26 Jul 2009
+    last modified : 13 Dec 2009
     copyright     : (C) 2008-2009 Wolf-Dieter Beelitz
 -->
 <!--    This program is free software; you can redistribute it and/or modify  -->
@@ -22,10 +22,10 @@
 		<attnum name="border outer" min="0.0" max="3.0" val="1.00"/>
 		<attnum name="border inner" min="0.0" max="3.0" val="0.10"/>
 
-		<attnum name="scale_brake" min="0.1" max="2.0" val="0.98"/>
-		<attnum name="scale_mu" min="0.1" max="2.0" val="1.02"/>
-		<attnum name="side brake" min="0.1" max="2.0" val="0.85"/>
-		<attnum name="side mu" min="0.1" max="2.0" val="0.85"/>
+		<attnum name="scale_brake" min="0.1" max="2.0" val="0.95"/>
+		<attnum name="scale_mu" min="0.1" max="2.0" val="0.95"/>
+		<attnum name="side brake" min="0.1" max="2.0" val="0.90"/>
+		<attnum name="side mu" min="0.1" max="2.0" val="0.90"/>
 
 		<attnum name="scale bump" min="0" max="1" val="0.08"/>
 		<attnum name="scale bump outer" min="0" max="2" val="0.2"/>
diff --git a/src/drivers/simplix/simplix_36GP/tracks/aalborg.xml b/src/drivers/simplix/simplix_36GP/tracks/aalborg.xml
index 8c0285811..130d832b5 100644
--- a/src/drivers/simplix/simplix_36GP/tracks/aalborg.xml
+++ b/src/drivers/simplix/simplix_36GP/tracks/aalborg.xml
@@ -2,7 +2,7 @@
 <!-- 
     file          : aalborg.xml 
     created       : 28 Mar 2008 
-    last modified : 26 Jul 2009
+    last modified : 13 Dec 2009
     copyright     : (C) 2008-2009 Wolf-Dieter Beelitz
 -->
 <!--    This program is free software; you can redistribute it and/or modify  -->
@@ -21,7 +21,7 @@
 		<attnum name="border outer" min="0" max="2" val="0.5"/>
 
 		<attnum name="scale_brake" min="0.1" max="2.0" val="1.00"/>
-		<attnum name="scale_brake" min="0.1" max="2.0" val="1.00"/>
+		<attnum name="scale_mu" min="0.1" max="2.0" val="1.00"/>
 		<attnum name="side brake" min="0.1" max="2.0" val="0.70"/>
 		<attnum name="side mu" min="0.1" max="2.0" val="0.40"/>
 
diff --git a/src/drivers/simplix/simplix_36GP/tracks/e-track-6.xml b/src/drivers/simplix/simplix_36GP/tracks/e-track-6.xml
index aa63bc22c..15b64fb41 100644
--- a/src/drivers/simplix/simplix_36GP/tracks/e-track-6.xml
+++ b/src/drivers/simplix/simplix_36GP/tracks/e-track-6.xml
@@ -2,7 +2,7 @@
 <!-- 
     file          : e-track-6.xml
     created       : 28 Mar 2008 
-    last modified : 26 Jul 2009
+    last modified : 13 Jul 2009
     copyright     : (C) 2008-2009 Wolf-Dieter Beelitz
 -->
 <!--    This program is free software; you can redistribute it and/or modify  -->
@@ -20,8 +20,8 @@
 		<attnum name="scale skill" val="4.00"/>
 		<attnum name="border outer" min="0" max="2" val="0.5"/>
 
-		<attnum name="scale_brake" min="0.1" max="2.0" val="1.00"/>
-		<attnum name="scale_mu" min="0.1" max="2.0" val="1.00"/>
+		<attnum name="scale_brake" min="0.1" max="2.0" val="0.95"/>
+		<attnum name="scale_mu" min="0.1" max="2.0" val="0.92"/>
 
 		<attnum name="scale bump" min="0" max="1" val="0.01"/>
 		<attnum name="scale bump outer" min="0" max="2" val="0.02"/>
diff --git a/src/drivers/simplix/simplix_36GP/tracks/forza.xml b/src/drivers/simplix/simplix_36GP/tracks/forza.xml
index f0f7a0ead..477b84255 100644
--- a/src/drivers/simplix/simplix_36GP/tracks/forza.xml
+++ b/src/drivers/simplix/simplix_36GP/tracks/forza.xml
@@ -2,7 +2,7 @@
 <!-- 
     file          : forza.xml
     created       : 28 Mar 2008 
-    last modified : 27 Jul 2009
+    last modified : 13 Dec 2009
     copyright     : (C) 2008-2009 Wolf-Dieter Beelitz
 -->
 <!--    This program is free software; you can redistribute it and/or modify  -->
@@ -18,14 +18,15 @@
 
 		<attnum name="offset skill" val="0.0"/>
 		<attnum name="scale skill" val="4.00"/>
+		<attnum name="border inner" min="0" max="2" val="0.25"/>
 		<attnum name="border outer" min="0" max="2" val="1.5"/>
 
-		<attnum name="scale_brake" min="0.1" max="2.0" val="1.00"/>
-		<attnum name="scale_mu" min="0.1" max="2.0" val="1.07"/>
+		<attnum name="scale_brake" min="0.1" max="2.0" val="0.95"/>
+		<attnum name="scale_mu" min="0.1" max="2.0" val="0.85"/>
 
 		<attnum name="scale bump" min="0" max="1" val="0.001"/>
 		<attnum name="scale bump outer" min="0" max="2" val="0.001"/>
-		<attnum name="lookaheadfactor" min="0.0" max="0.5" val="0.4"/>
+		<attnum name="lookaheadfactor" min="0.0" max="0.5" val="0.2"/>
 
 		<attnum name="pit use first" min="0" max="1" val="1"/>
 		<attnum name="pit use smooth" min="0" max="1" val="1"/>
diff --git a/src/drivers/simplix/simplix_36GP/tracks/g-track-2.xml b/src/drivers/simplix/simplix_36GP/tracks/g-track-2.xml
index 9d3ca2c48..6f1beb4e6 100644
--- a/src/drivers/simplix/simplix_36GP/tracks/g-track-2.xml
+++ b/src/drivers/simplix/simplix_36GP/tracks/g-track-2.xml
@@ -2,7 +2,7 @@
 <!-- 
     file          : g-track-2.xml
     created       : 28 Mar 2008 
-    last modified : 27 Jul 2009
+    last modified : 13 Dec 2009
     copyright     : (C) 2008-2009 Wolf-Dieter Beelitz
 -->
 <!--    This program is free software; you can redistribute it and/or modify  -->
@@ -20,8 +20,8 @@
 		<attnum name="scale skill" val="4.00"/>
 		<attnum name="border outer" min="0" max="2" val="0.5"/>
 
-		<attnum name="scale_brake" min="0.1" max="2.0" val="1.00"/>
-		<attnum name="scale_mu" min="0.1" max="2.0" val="1.08"/>
+		<attnum name="scale_brake" min="0.1" max="2.0" val="0.95"/>
+		<attnum name="scale_mu" min="0.1" max="2.0" val="0.95"/>
 
 		<attnum name="scale bump" min="0" max="1" val="0.01"/>
 		<attnum name="scale bump outer" min="0" max="2" val="0.02"/>
diff --git a/src/drivers/simplix/simplix_36GP/tracks/migrants.xml b/src/drivers/simplix/simplix_36GP/tracks/migrants.xml
index 1dca850a5..8c7fd1022 100644
--- a/src/drivers/simplix/simplix_36GP/tracks/migrants.xml
+++ b/src/drivers/simplix/simplix_36GP/tracks/migrants.xml
@@ -21,8 +21,8 @@
 		<attnum name="border inner" min="0.0" max="3.0" val="0.10"/>
 		<attnum name="border outer" min="0" max="2" val="0.50"/>
 
-		<attnum name="scale_brake" min="0.1" max="2.0" val="1.00"/>
-		<attnum name="scale_mu" min="0.1" max="2.0" val="1.05"/>
+		<attnum name="scale_brake" min="0.1" max="2.0" val="0.95"/>
+		<attnum name="scale_mu" min="0.1" max="2.0" val="0.95"/>
 
 		<attnum name="scale bump" min="0" max="1" val="0.01"/>
 		<attnum name="scale bump outer" min="0" max="2" val="0.01"/>
diff --git a/src/drivers/simplix/simplix_36GP/tracks/ruudskogen.xml b/src/drivers/simplix/simplix_36GP/tracks/ruudskogen.xml
index 6c77c5d6f..25b5c18e5 100644
--- a/src/drivers/simplix/simplix_36GP/tracks/ruudskogen.xml
+++ b/src/drivers/simplix/simplix_36GP/tracks/ruudskogen.xml
@@ -2,7 +2,7 @@
 <!-- 
     file          : Ruudskogen.xml
     created       : 28 Mar 2008 
-    last modified : 27 Jul 2009
+    last modified : 13 Dec 2009
     copyright     : (C) 2008-2009 Wolf-Dieter Beelitz
 -->
 <!--    This program is free software; you can redistribute it and/or modify  -->
@@ -20,8 +20,8 @@
 		<attnum name="scale skill" val="4.00"/>
 		<attnum name="border outer" min="0" max="2" val="0.5"/>
 
-		<attnum name="scale_brake" min="0.1" max="2.0" val="1.00"/>
-		<attnum name="scale_mu" min="0.1" max="2.0" val="1.05"/>
+		<attnum name="scale_brake" min="0.1" max="2.0" val="0.95"/>
+		<attnum name="scale_mu" min="0.1" max="2.0" val="0.90"/>
 
 		<attnum name="scale bump" min="0" max="1" val="0.04"/>
 		<attnum name="scale bump outer" min="0" max="2" val="0.06"/>
diff --git a/src/drivers/simplix/simplix_36GP/tracks/wheel-2.xml b/src/drivers/simplix/simplix_36GP/tracks/wheel-2.xml
index cfeab79a3..b1468cebc 100644
--- a/src/drivers/simplix/simplix_36GP/tracks/wheel-2.xml
+++ b/src/drivers/simplix/simplix_36GP/tracks/wheel-2.xml
@@ -2,7 +2,7 @@
 <!-- 
     file          : wheel-2.xml
     created       : 28 Mar 2008 
-    last modified : 27 Jul 2009
+    last modified : 13 Dec 2009
     copyright     : (C) 2008-2009 Wolf-Dieter Beelitz
 -->
 <!--    This program is free software; you can redistribute it and/or modify  -->
@@ -20,8 +20,8 @@
 		<attnum name="scale skill" val="4.00"/>
 		<attnum name="border outer" min="0" max="2" val="0.5"/>
 
-		<attnum name="scale_brake" min="0.1" max="2.0" val="1.00"/>
-		<attnum name="scale_mu" min="0.1" max="2.0" val="1.00"/>
+		<attnum name="scale_brake" min="0.1" max="2.0" val="0.95"/>
+		<attnum name="scale_mu" min="0.1" max="2.0" val="0.85"/>
 
 		<attnum name="scale bump" min="0" max="1" val="0.02"/>
 		<attnum name="scale bump outer" min="0" max="2" val="0.04"/>