diff --git a/kicad/readme.md b/kicad/readme.md
index 9ecd154..97cd17a 100644
--- a/kicad/readme.md
+++ b/kicad/readme.md
@@ -2,6 +2,6 @@
 
 If you are designing a new ECU frame see https://github.com/andreika-git/hellen-one/tree/master/modules
 
-This folder contains module _source_ files, not reusable resulting frames.
+doThis folder contains module _source_ files, not reusable resulting frames like [here](../modules).
 
 See https://github.com/andreika-git/hellen-one/wiki/scripts-howto#how-to-create-a-module
diff --git a/modules/readme.md b/modules/readme.md
index 49eee9b..eeba560 100644
--- a/modules/readme.md
+++ b/modules/readme.md
@@ -1 +1,3 @@
+This folder contains footprints/gerbers/PDFs which hellen-one framework would merge into your frame design.
+
 See https://github.com/andreika-git/hellen-one/wiki for module documentation
diff --git a/modules/vr-discrete/readme.md b/modules/vr-discrete/readme.md
index b53954b..56080c1 100644
--- a/modules/vr-discrete/readme.md
+++ b/modules/vr-discrete/readme.md
@@ -1 +1,3 @@
 See https://github.com/andreika-git/hellen-one/wiki/module-vr-discrete
+
+[Source files](../../kicad/modules/hellen1-vr-discrete)
\ No newline at end of file
diff --git a/modules/wbo/changelog.md b/modules/wbo/readme.md
similarity index 50%
rename from modules/wbo/changelog.md
rename to modules/wbo/readme.md
index 8741647..ff288de 100644
--- a/modules/wbo/changelog.md
+++ b/modules/wbo/readme.md
@@ -1,3 +1,11 @@
+[Source files](../../kicad/modules/hellen1-wbo)
+
+## Changelog
+
+0.4:
+  - two side assembly
+  - BUG: CANH/CANL traces are flipped
+
 0.3: 
   - MOSFET through-hole option 
   - https://github.com/andreika-git/hellen-one/blob/master/modules/wbo/wbo-0.3-migration.png remove one track and refill zones