diff --git a/chrysemys/README.md b/chrysemys/README.md
index 8ed196e..cc0becc 100644
--- a/chrysemys/README.md
+++ b/chrysemys/README.md
@@ -23,7 +23,13 @@ A 34-key single-board keyboard created with [Ergogen](https://ergogen.xyz).
 
 ## Center Cover
 
-Work in progress
+After use, I have decided to instead place the battery under the nice!nano and omit the center cover. This does leave a hole in the middle of the keyboard, but maybe we just call it a handle.
+
+## Firmware
+
+- [Docs](https://zmk.dev/docs/development/build-flash#building-from-zmk-config-folder) on building firmware using the `zmk-config` from this repo.
+  - Note: It still needs to be built from inside the `/app` directory in the ZMK repo.
+  - `west build -b nice_nano_v2 -- -DSHIELD=chrysemys -DZMK_CONFIG="/workspaces/zmk-config/config"`
 
 ## Inspiration
 
diff --git a/chrysemys/chrysemys.yaml b/chrysemys/chrysemys.yaml
index afa524f..9635e01 100644
--- a/chrysemys/chrysemys.yaml
+++ b/chrysemys/chrysemys.yaml
@@ -1,3 +1,10 @@
+#
+# NOTES:
+#
+# - The thumb key nets are inverted compared to rest
+# - The right half column nets are in a strange order
+#
+
 units:
   cx: 18 # Keycap is 17.5mm wide
   cy: 17 # Keycap is 16.5mm tall