diff --git a/example_config.py b/example_config.py
index af5c2f0..1fcdae9 100644
--- a/example_config.py
+++ b/example_config.py
@@ -1,33 +1,120 @@
-"""
-A small sample config for PFERD.
-"""
-from pathlib import Path
+import argparse
+from pathlib import Path, PurePath
 
-from PFERD import Pferd, enable_logging
-from PFERD.ilias.download_strategies import (download_everything,
-                                             download_modified_or_new)
+import PFERD
+from PFERD.transform import (attempt, glob, keep, move, move_dir, optionally,
+                             re_move)
+
+tf_ss_2020_numerik = attempt(
+    re_move(r"Übungsblätter/(\d+)\. Übungsblatt/.*", "Blätter/Blatt_{1:0>2}.pdf"),
+    keep,
+)
+
+
+tf_ss_2020_db = attempt(
+    move_dir("Begrüßungsvideo/", "Vorlesung/Videos/"),
+    move_dir("Vorlesungsmaterial/Vorlesungsvideos/", "Vorlesung/Videos/"),
+    move_dir("Vorlesungsmaterial/", "Vorlesung/"),
+    keep,
+)
+
+
+tf_ss_2020_rechnernetze = attempt(
+    re_move(r"Vorlesungsmaterial/.*/(.+?)\.mp4", "Vorlesung/Videos/{1}.mp4"),
+    move_dir("Vorlesungsmaterial/", "Vorlesung/"),
+    keep,
+)
+
+
+tf_ss_2020_sicherheit = attempt(
+    move_dir("Vorlesungsvideos/", "Vorlesung/Videos/"),
+    move_dir("Übungsvideos/", "Übung/Videos/"),
+    re_move(r"VL(.*)\.pdf", "Vorlesung/{1}.pdf"),
+    re_move(r"Übungsblatt (\d+)\.pdf", "Blätter/Blatt_{1:0>2}.pdf"),
+    move("Chiffrat.txt", "Blätter/Blatt_01_Chiffrat.txt"),
+    keep,
+)
+
+
+tf_ss_2020_pg = attempt(
+    move_dir("Vorlesungsaufzeichnungen/", "Vorlesung/Videos/"),
+    move_dir("Vorlesungsmaterial/", "Vorlesung/"),
+    re_move(r"Übungen/uebungsblatt(\d+).pdf", "Blätter/Blatt_{1:0>2}.pdf"),
+    keep,
+)
+
+
+def df_ss_2020_or1(path: PurePath) -> bool:
+    if glob("Tutorien/")(path): return True
+    if glob("Tutorien/Tutorium 10, dienstags 15:45 Uhr/")(path): return True
+    if glob("Tutorien/*")(path): return False
+    return True
+
+
+tf_ss_2020_or1 = attempt(
+    move_dir("Vorlesung/Unbeschriebene Folien/", "Vorlesung/Folien/"),
+    move_dir("Video zur Organisation/", "Vorlesung/Videos/"),
+    keep,
+)
 
 
 def main() -> None:
-    enable_logging()
-    pferd = Pferd(Path(__file__).parent)
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--test-run", action="store_true")
+    parser.add_argument("synchronizers", nargs="*")
+    args = parser.parse_args()
 
-    # Synchronize "databases" and only download files with a more recent timestamp than
-    # the local copy, if any exists.
-    pferd.ilias_kit(
-        Path("DB"),
-        "1101554",
-        cookies=Path("ilias_cookies.txt"),
-        download_strategy=download_modified_or_new
-    )
+    PFERD.enable_logging()
+    pferd = PFERD.Pferd(Path(__file__).parent, test_run=args.test_run)
 
-    # Synchronize "databases" and redownload every file (default).
-    pferd.ilias_kit(
-        Path("DB"),
-        "1101554",
-        cookies=Path("ilias_cookies.txt"),
-        download_strategy=download_everything
-    )
+    if not args.synchronizers or "numerik" in args.synchronizers:
+        pferd.ilias_kit(
+            target="Numerik",
+            course_id="1083036",
+            transform=tf_ss_2020_numerik,
+            cookies="ilias_cookies.txt",
+        )
+
+    if not args.synchronizers or "db" in args.synchronizers:
+        pferd.ilias_kit(
+            target="DB",
+            course_id="1101554",
+            transform=tf_ss_2020_db,
+            cookies="ilias_cookies.txt",
+        )
+
+    if not args.synchronizers or "rechnernetze" in args.synchronizers:
+        pferd.ilias_kit(
+            target="Rechnernetze",
+            course_id="1099996",
+            transform=tf_ss_2020_rechnernetze,
+            cookies="ilias_cookies.txt",
+        )
+
+    if not args.synchronizers or "sicherheit" in args.synchronizers:
+        pferd.ilias_kit(
+            target="Sicherheit",
+            course_id="1101980",
+            transform=tf_ss_2020_sicherheit,
+            cookies="ilias_cookies.txt",
+        )
+
+    if not args.synchronizers or "pg" in args.synchronizers:
+        pferd.ilias_kit(
+            target="PG",
+            course_id="1106095",
+            transform=tf_ss_2020_pg,
+            cookies="ilias_cookies.txt",
+        )
+
+    if not args.synchronizers or "or1" in args.synchronizers:
+        pferd.ilias_kit(
+            target="OR1",
+            course_id="1105941",
+            dir_filter=df_ss_2020_or1,
+            transform=tf_ss_2020_or1,
+            cookies="ilias_cookies.txt",
+        )
 
 
 if __name__ == "__main__":