Something like 13 or 14 hours alone and then more when I play with others, 16 hours back-to-back with Marcel Dettmann is my record. How has the venue changed since you started in 2004? Obviously, the structure hasn't changed but the sound has evolved, in terms of DJs playing and club nights using it as their base. The main thing that is different is that nights have gone from being 'all-nighers' to even longer and longer nights. The range of music being played has widened as well, as labels like Innervisions have come in. How has Berlin more widely changed in its embrace of techno? After the wall came down both the city and the techno scene became more raw and optimistic. While Berlin still retains this great atmosphere on the whole, things have become more controlled and sceney, less surprises and more routine. What other cities feature on your list of techno hotspots? Detroit, London, other parts of Berlin. There are too many to say. Sometimes you find an amazing scene somewhere where you least expect it, like Italy. Tokyo is also a great place for techno, it has amazing soundsystems and knowledgeable music lovers. New York's techno scene is also growing. Time Warp this year was one of the most enjoyable festivals. Also Igloo Fest in Montreal was outstanding; thousands of ravers at minus ten degrees, in the snow with colourful winter clothing in the centre of the city was a great departure from the norm. Do you