diff --git a/backup_edits.py b/backup_edits.py
index 438c5b9..e476f57 100755
--- a/backup_edits.py
+++ b/backup_edits.py
@@ -30,7 +30,7 @@ if __name__ == '__main__':
         edit = api.getEdit(id=i['id'])['data']
         if edit['status'] == 'private':
             continue
-        path = i['id'].replace(':', '_').replace('/', '_') + '.json'
+        path = i['id'].replace(':', '\uf022').replace('/', '_').replace('|', '_') + '.json'
         path = ox.decode_html(path)
         path = os.path.join(target, path)
         ox.makedirs(os.path.dirname(path))
diff --git a/backup_films.py b/backup_films.py
index 3a58c03..0cec930 100755
--- a/backup_films.py
+++ b/backup_films.py
@@ -12,9 +12,12 @@ def get_extension(api, oshash):
     r = api.findMedia({'query': {
         'conditions': [{'key': 'oshash', 'value': oshash}]
     }, 'keys': ['extension']})['data']
-    return r['items'][0]['extension']
+    return r['items'][0]['extension'].lower()
 
 
+COLON = '\uf022'
+COLON = ':'
+
 if __name__ == '__main__':
     if len(sys.argv) > 1:
         target = sys.argv[1]
@@ -28,7 +31,7 @@ if __name__ == '__main__':
     api = ox.api.signin('https://%s/api/' % site)
 
     keep = []
-    r = api.find({'range': [0, 1000], 'keys': ['id']})
+    r = api.find({'range': [0, 10000], 'keys': ['id']})
     for i in r['data']['items']:
         item = api.get(id=i['id'], keys=['id', 'streams', 'title', 'director', 'year', 'instances'])['data']
         director = item.get('director', ['Unknown Director'])
@@ -38,7 +41,10 @@ if __name__ == '__main__':
         path = ox.decode_html(path)
         prefix = ox.decode_html(item['title'])
 
-        keep.append(unicodedata.normalize('NFD', os.path.join(target, path, 'annotations.json')))
+        path = path.replace(':', COLON)
+        prefix = prefix.replace(':', COLON)
+
+        keep.append(unicodedata.normalize('NFD', os.path.join(target, path, 'annotations.json')).lower())
 
         parts = []
         if len(item['streams']) == 1:
@@ -46,6 +52,7 @@ if __name__ == '__main__':
             ext = get_extension(api, id)
             name = '%s.%s' % (item['title'], ext)
             name = ox.decode_html(name)
+            name = name.replace(':', COLON)
             part = 1
             parts.append([os.path.join(path, name), item['id'], id, part])
         else:
@@ -54,12 +61,14 @@ if __name__ == '__main__':
                 ext = get_extension(api, id)
                 name = '%s.Part %d.%s' % (prefix, part, ext)
                 name = ox.decode_html(name)
+                name = name.replace(':', COLON)
                 parts.append([os.path.join(path, name), item['id'], id, part])
                 part += 1
 
         for path, id, oshash, part in parts:
             abspath = os.path.join(target, path)
             if os.path.exists(abspath) and ox.oshash(abspath) != oshash:
+                print('file changed', abspath[len(target):])
                 os.unlink(abspath)
             if not os.path.exists(abspath):
                 url = 'https://%s/%s/download/source/%s' % (site, id, part)
@@ -68,11 +77,11 @@ if __name__ == '__main__':
                     api.save_url(url, abspath)
                 except:
                     print('failed to download', url)
-            keep.append(unicodedata.normalize('NFD', abspath))
+            keep.append(unicodedata.normalize('NFD', abspath).lower())
 
     for root, folders, files in os.walk(target):
         for f in files:
             path = os.path.join(root, f)
-            if unicodedata.normalize('NFD', path) not in keep:
+            if unicodedata.normalize('NFD', path).lower() not in keep:
                 print('deleting', path)
                 os.unlink(path)
diff --git a/ontology/ontology.json b/ontology/ontology.json
index df657c9..52cd6fc 100644
--- a/ontology/ontology.json
+++ b/ontology/ontology.json
@@ -264,6 +264,8 @@
                                 "soup": {},
                                 "tea": {}
                             },
+                            "tech": {
+                            },
                             "miscellaneous": {
                                 "bicycle": {},
                                 "make-up": {},
diff --git a/static/html/print.html b/static/html/print.html
index be06c7e..faf54f9 100644
--- a/static/html/print.html
+++ b/static/html/print.html
@@ -1,3 +1,4 @@
+<meta charset="utf-8" />
 <script src="/static/oxjs/min/Ox.js"></script>
 <script>
 function pandora_api(action, data, callback) {
diff --git a/static/ontology/index.css b/static/ontology/index.css
index dc61099..7dd1943 100644
--- a/static/ontology/index.css
+++ b/static/ontology/index.css
@@ -19,3 +19,9 @@ body {
   stroke: #ccc;
   stroke-width: 1.5px;
 }
+
+.zoom {
+    position: fixed;
+    top: 5px;
+    right: 5px;
+}
diff --git a/static/ontology/index.html b/static/ontology/index.html
index eda477c..bdc9d9b 100644
--- a/static/ontology/index.html
+++ b/static/ontology/index.html
@@ -7,6 +7,10 @@
   <title>Ontology Tree</title>
 </head>
 <body>
+  <div class="zoom">
+      <button class="plus">+</button>
+      <button class="minus">-</button>
+  </div>
   <script src="index.js"></script>
 </body>
 </html>
diff --git a/static/ontology/index.js b/static/ontology/index.js
index bcab5a4..d514a4e 100644
--- a/static/ontology/index.js
+++ b/static/ontology/index.js
@@ -51,6 +51,22 @@ function resize() {
   update(root);
 }
 
+function zoom(size) {
+    height = size;
+    tree.size([height, width]);
+    svg.attr("width", width).attr("height", height + margin.top + margin.bottom)
+    document.querySelector('svg').attributes.height.value = height + margin.top + margin.bottom
+    resize()
+}
+
+
+document.querySelector('.zoom button.plus').addEventListener('click', function(event) {
+    zoom(height*1.5)
+})
+document.querySelector('.zoom button.minus').addEventListener('click', function(event) {
+    zoom(height/1.5)
+})
+
 
 function get_color(d) {
   if (d.children || d._children) {
@@ -95,7 +111,8 @@ function update(source) {
       })
       .text(function(d) {
           if (d.children || d._children) {
-              return d.name;
+              //return d.name;
+              return d.name + '(' + (d.children || d._children).length +')';
           }
           return d.name + ' (' + d.size + ')';
       })