The Opera House building is synonymous worldwide with Sydney, Australia. The unique shape (see photo) is actually due to the architect wanting to recreate the geometry of orange segments, not to project the image of sails on the harbour as is generally believed. However, whatever the origin of its conceptualization, the problems of maintaining such a shape remain. So, when a new development in mobile systems was recently revealed, there was an immediate interest to establish its capabilities for fixing the leaks in the Opera House roof. The new development is called “Mr Plod” (see photo). Mr Plod is really an “it” but “he” sounds better.