diff --git a/src-extra/AirStart.java b/core/src-extra/AirStart.java
similarity index 100%
rename from src-extra/AirStart.java
rename to core/src-extra/AirStart.java
diff --git a/src-extra/altimeter/Alt15K.java b/core/src-extra/altimeter/Alt15K.java
similarity index 100%
rename from src-extra/altimeter/Alt15K.java
rename to core/src-extra/altimeter/Alt15K.java
diff --git a/src-extra/altimeter/AltData.java b/core/src-extra/altimeter/AltData.java
similarity index 100%
rename from src-extra/altimeter/AltData.java
rename to core/src-extra/altimeter/AltData.java
diff --git a/src-extra/altimeter/RotationLogger.java b/core/src-extra/altimeter/RotationLogger.java
similarity index 100%
rename from src-extra/altimeter/RotationLogger.java
rename to core/src-extra/altimeter/RotationLogger.java
diff --git a/src-extra/altimeter/SerialDownload.java b/core/src-extra/altimeter/SerialDownload.java
similarity index 100%
rename from src-extra/altimeter/SerialDownload.java
rename to core/src-extra/altimeter/SerialDownload.java