diff --git a/.gitignore b/.gitignore
index 1acf1bd..f3e9c78 100644
--- a/.gitignore
+++ b/.gitignore
@@ -28,3 +28,6 @@ target/
 # Ignore KiCad backups and lock files
 hardware/c_its-companion/c_its-companion-backups/
 *.kicad_pro.lck
+
+# Ignore FreeCAD backups
+*.FCBak
diff --git a/hardware/housing/c_its-companion-assembly.FCStd b/hardware/housing/c_its-companion-assembly.FCStd
new file mode 100644
index 0000000..1c6d8b8
Binary files /dev/null and b/hardware/housing/c_its-companion-assembly.FCStd differ
diff --git a/hardware/housing/c_its-companion-housing-Bottom.3mf b/hardware/housing/c_its-companion-housing-Bottom.3mf
new file mode 100644
index 0000000..34befcd
Binary files /dev/null and b/hardware/housing/c_its-companion-housing-Bottom.3mf differ
diff --git a/hardware/housing/c_its-companion-housing-Lid.3mf b/hardware/housing/c_its-companion-housing-Lid.3mf
new file mode 100644
index 0000000..f540952
Binary files /dev/null and b/hardware/housing/c_its-companion-housing-Lid.3mf differ
diff --git a/hardware/housing/c_its-companion-housing.FCStd b/hardware/housing/c_its-companion-housing.FCStd
new file mode 100644
index 0000000..0abc2d3
Binary files /dev/null and b/hardware/housing/c_its-companion-housing.FCStd differ