Hi folks I have the older (ancient!) soda stream tanks which are smaller to carry round, is there an adapter which covered these? I don't know what the thread is called just that it's considered Au/Nz fitting. Even if these could be removed and swapped for the newer ones that would be great. Anyone had any success with either? (An adapter or swapping the threads). Thanks. (Sorry about image orientation, don't know why it turned and can't seem to edit it)