Yesterday's beauty was an exceptio, but the porphyry seems to be more affected by penetrative veining and metasomatism. In addition, drilling speed increased considerably: only 3.5 - 4 h per 6 m core run. Those were the good news. At about 5 pm, drilling stopped and it soon became clear that the bit was worn down 37 h from the planned end of the drilling operations. What to do? 5 hours earlier or later, the decision would have been easy. Eventually, we decided to change the bit a last time and try to get a couple of core runs before we have to pull out for good.