Each one of those ['Ellipsoids'] took at least three months [each]. I was starting those, when I was still at the Düsseldorf Academy. There was a very nice man in the workshop there who was very helpful in the process of making them. And they were extremely complicated – to get the shape right and everything. I mean one could get them sent to a factory, and have them produced according to these computer drawings, but somehow I didn't really want to do this at the time – and also I did not have the money to do that anyway. Once I tried to have one fabricated in this way, but when it came back there was nothing there somehow. It was not like the ones that were made in the workshop.