diff --git a/Aircraft/Instruments-3d/glider/flarm/README.install b/Aircraft/Instruments-3d/glider/flarm/README.install
index cee0fe286..6489c493b 100644
--- a/Aircraft/Instruments-3d/glider/flarm/README.install
+++ b/Aircraft/Instruments-3d/glider/flarm/README.install
@@ -47,11 +47,11 @@ To install this instrument into your aircraft, you need to do the following:
 	<condition>
 		<and>
 			<greater-than>
-				<property>/systems/electrical/outputs/flarm</property>
+				<property>systems/electrical/outputs/flarm</property>
 				<value>9</value>
 			</greater-than>
 			<equals>
-				<property>/instrumentation/flarm/new-contact</property>
+				<property>instrumentation/flarm/new-contact</property>
 				<value>0</value>
 			</equals>
 		</and>
@@ -70,11 +70,11 @@ To install this instrument into your aircraft, you need to do the following:
 	<condition>
 		<and>
 			<greater-than>
-				<property>/systems/electrical/outputs/flarm</property>
+				<property>systems/electrical/outputs/flarm</property>
 				<value>9</value>
 			</greater-than>
 			<equals>
-				<property>/instrumentation/flarm/new-contact</property>
+				<property>instrumentation/flarm/new-contact</property>
 				<value>1</value>
 			</equals>
 		</and>
@@ -94,11 +94,11 @@ To install this instrument into your aircraft, you need to do the following:
 	<condition>
 		<and>
 			<greater-than>
-				<property>/systems/electrical/outputs/flarm</property>
+				<property>systems/electrical/outputs/flarm</property>
 				<value>9</value>
 			</greater-than>
 			<equals>
-				<property>/instrumentation/flarm/warn</property>
+				<property>instrumentation/flarm/warn</property>
 				<value>1</value>
 			</equals>
 		</and>
@@ -118,11 +118,11 @@ To install this instrument into your aircraft, you need to do the following:
 	<condition>
 		<and>
 			<greater-than>
-				<property>/systems/electrical/outputs/flarm</property>
+				<property>systems/electrical/outputs/flarm</property>
 				<value>9</value>
 			</greater-than>
 			<equals>
-				<property>/instrumentation/flarm/warn</property>
+				<property>instrumentation/flarm/warn</property>
 				<value>2</value>
 			</equals>
 		</and>
diff --git a/Aircraft/Instruments-3d/glider/vario/S3/README.install b/Aircraft/Instruments-3d/glider/vario/S3/README.install
index 9372db8d4..e8eebe94d 100644
--- a/Aircraft/Instruments-3d/glider/vario/S3/README.install
+++ b/Aircraft/Instruments-3d/glider/vario/S3/README.install
@@ -44,25 +44,25 @@ To install this instrument into your aircraft, you need to do the following:
 	<condition>
 		<and>
 			<greater-than>
-				<property>/instrumentation/s3/te-reading-mps</property>
+				<property>instrumentation/s3/te-reading-mps</property>
 				<value>0.01</value>
 			</greater-than>
 			<greater-than-equals>
-				<property>/systems/electrical/outputs/S3</property>
+				<property>systems/electrical/outputs/S3</property>
 				<value>9</value>
 			</greater-than-equals>
 			<equals>
-				<property>/instrumentation/s3/start</property>
+				<property>instrumentation/s3/start</property>
 				<value>1.0</value>
 			</equals>
 		</and>
 	</condition>
 	<pitch>
-		<property>/instrumentation/s3/sound-pitch</property>
+		<property>instrumentation/s3/sound-pitch</property>
 		<offset>0</offset>
 	</pitch>
 	<volume>
-		<property>/instrumentation/s3/volume</property>
+		<property>instrumentation/s3/volume</property>
 		<factor>1</factor>
 		<max>1</max>
 	</volume>
@@ -83,29 +83,29 @@ To install this instrument into your aircraft, you need to do the following:
 	<condition>
 		<and>
 			<greater-than>
-				<property>/instrumentation/s3/te-reading-mps</property>
+				<property>instrumentation/s3/te-reading-mps</property>
 				<value>-10.00</value>
 			</greater-than>
 			<less-than>
-				<property>/instrumentation/s3/te-reading-mps</property>
+				<property>instrumentation/s3/te-reading-mps</property>
 				<value>-0.01</value>
 			</less-than>
 			<greater-than-equals>
-				<property>/systems/electrical/outputs/S3</property>
+				<property>systems/electrical/outputs/S3</property>
 				<value>9</value>
 			</greater-than-equals>
 			<equals>
-				<property>/instrumentation/s3/start</property>
+				<property>instrumentation/s3/start</property>
 				<value>1.0</value>
 			</equals>
 		</and>
 	</condition>
 	<pitch>
-		<property>/instrumentation/s3/sound-pitch</property>
+		<property>instrumentation/s3/sound-pitch</property>
 		<offset>0</offset>
 	</pitch>
 	<volume>
-		<property>/instrumentation/s3/volume</property>
+		<property>instrumentation/s3/volume</property>
 		<factor>1</factor>
 		<max>1</max>
 	</volume>
diff --git a/Aircraft/Instruments-3d/glider/vario/ilec-sc7/README_install b/Aircraft/Instruments-3d/glider/vario/ilec-sc7/README_install
index e9b87e50c..a6b1d5939 100644
--- a/Aircraft/Instruments-3d/glider/vario/ilec-sc7/README_install
+++ b/Aircraft/Instruments-3d/glider/vario/ilec-sc7/README_install
@@ -23,7 +23,7 @@ You will need to :
     </and>
   </condition>
   <pitch>
-    <property>/instrumentation/ilec-sc7/sound-pitch</property>
+    <property>instrumentation/ilec-sc7/sound-pitch</property>
     <offset>0</offset><!-- Do not remove, default is 1 -->
   </pitch>
   <volume>
@@ -53,7 +53,7 @@ You will need to :
     </and>
   </condition>
   <pitch>
-    <property>/instrumentation/ilec-sc7/sound-pitch</property>
+    <property>instrumentation/ilec-sc7/sound-pitch</property>
     <offset>0</offset><!-- Do not remove, default is 1 -->
   </pitch>
   <volume>