diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 0000000..f0287ab
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,22 @@
+repos:
+- repo: https://github.com/ambv/black
+  rev: 20.8b1
+  hooks:
+  - id: black
+- repo: https://github.com/asottile/reorder_python_imports
+  rev: v2.3.5
+  hooks:
+  -   id: reorder-python-imports
+- repo: https://gitlab.com/pycqa/flake8
+  rev: '3.8.4'
+  hooks:
+  - id: flake8
+    args: ["--config=setup.cfg"]
+    language_version: python3
+- repo: local
+  hooks:
+  - id: migrations-check
+    language: system
+    name: Export the notes.
+    entry: bash -c "./joplinexport.py"
+    pass_filenames: false
diff --git a/content/drone-stuff/omnibus-f4-pro-servo-diode.md b/content/drone-stuff/omnibus-f4-pro-servo-diode.md
index 4d3aad2..e888338 100644
--- a/content/drone-stuff/omnibus-f4-pro-servo-diode.md
+++ b/content/drone-stuff/omnibus-f4-pro-servo-diode.md
@@ -4,6 +4,8 @@ weight = 1
 sort_by = "weight"
 insert_anchor_links = "right"
 +++
-To isolate the servo 5V rail, remove this diode:
+To isolate the servo 5V rail from the controller's 5V power supply, remove this diode:
 
-![a435bcae86912205b6fac41731285b8d.png](../../6d668e05d8a54580966b94a752f3b7db.png)
\ No newline at end of file
+![a435bcae86912205b6fac41731285b8d.png](../../6d668e05d8a54580966b94a752f3b7db.png)
+
+Now the servos' 5V rail can be powered from another 5V supply to avoid servo current backflow into the FC.
\ No newline at end of file