diff --git a/html/markers.js b/html/markers.js
index fa9e514..4232b7d 100644
--- a/html/markers.js
+++ b/html/markers.js
@@ -158,9 +158,10 @@ var TypeDesignatorIcons = {
 	'CL35': ['jet_swept', 0.92],
 	'CL60': ['jet_swept', 0.96], // 22t
 	'GLEX': ['jet_swept', 1],
+	'G150': ['jet_swept', 0.88], // 11t
+	'G280': ['jet_swept', 0.92], // 18t
 	'GL5T': ['jet_swept', 1],
 	'GLF2': ['jet_swept', 0.92],
-	'G280': ['jet_swept', 0.92],
 	'GLF3': ['jet_swept', 0.96],
 	'GLF4': ['jet_swept', 0.96],
 	'GLF5': ['jet_swept', 0.96],
diff --git a/install.sh b/install.sh
index 47e9fd6..d99835e 100755
--- a/install.sh
+++ b/install.sh
@@ -50,6 +50,7 @@ if [ -f $ipath/html/defaults.js ]; then
 	cp $ipath/html/config.js html/
 fi
 
+rm -f $ipath/html/db/*.json
 cp -r * $ipath
 
 # bust cache for all css and js files
diff --git a/web.sh b/web.sh
new file mode 100755
index 0000000..a9a3d49
--- /dev/null
+++ b/web.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+
+# file for local testing of changes to the webinterface
+
+ipath=/usr/local/share/tar1090
+mkdir -p $ipath
+
+mv $ipath/html/config.js /tmp/
+
+rm -f $ipath/html/db/*.json
+cp -r html $ipath
+
+mv /tmp/config.js $ipath/html/
+
+# bust cache for all css and js files
+sed -i -e "s/__cache_version__/$(date +%s)/g" $ipath/html/index.html
+