diff --git a/hw/gerbers/README.md b/hw/gerbers/README.md
new file mode 100644
index 0000000..cee54dd
--- /dev/null
+++ b/hw/gerbers/README.md
@@ -0,0 +1 @@
+# BlueSCSI Hardware © 2021 by Eric Helgeson is licensed under Attribution-NonCommercial 4.0 International
diff --git a/platformio.ini b/platformio.ini
index 15a465e..522db27 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -29,7 +29,7 @@ build_flags =
     -DARDUINO=10813
     -DARDUINO_ARCH_STM32
     -DDEBUG_LEVEL=DEBUG_NONE
-    -O3
+    -O2
 
 ; Work around for clones.
 ; https://community.platformio.org/t/cannot-upload-to-stm32-bluepill-board-over-stlink-v2/3492/25