diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..c459d48
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,6 @@
+[submodule "Hardware/CYCLONE_2/MCAD"]
+	path = Hardware/CYCLONE_2/MCAD
+	url = ssh://git@github.com/openscad/MCAD.git
+[submodule "Hardware/CYCLONE_2/libs/MCAD"]
+	path = Hardware/CYCLONE_2/libs/MCAD
+	url = ssh://git@github.com/openscad/MCAD.git
diff --git a/Hardware/CYCLONE_2/MCAD b/Hardware/CYCLONE_2/MCAD
new file mode 160000
index 0000000..85794e4
--- /dev/null
+++ b/Hardware/CYCLONE_2/MCAD
@@ -0,0 +1 @@
+Subproject commit 85794e4b4f2294a1b445a4d928866bedd5cc64ec
diff --git a/Hardware/CYCLONE_2/libs/MCAD b/Hardware/CYCLONE_2/libs/MCAD
new file mode 160000
index 0000000..85794e4
--- /dev/null
+++ b/Hardware/CYCLONE_2/libs/MCAD
@@ -0,0 +1 @@
+Subproject commit 85794e4b4f2294a1b445a4d928866bedd5cc64ec