HotWheels Track Launcher key

My son has this HotWheels®️ track that has a spring with a spring that has a key to arm it.At some point the key snapped so I printed a replacement, which I am sharing with the world here.The original key had this small notches on the sides to fix the key in the launcher. I didn't like this feature because it made it impossible to disassemble the track to make it flat again.If you still need the notches see the _notches file.Used 5 walls, but 3 should be fine as well.Orientation as in the stl.