There is an ensemble version and also a solo piano version by C Fox. My version was rubbish and I threw it away soon after its only performance in 1988. There is also of course the London-based
Ensemble Plus Minus which has made a specialty of performing different versions of it.
My opinion is that realising it is a waste of time that could better be spent on writing one's own pieces or working on Stockhausen's later and more rewarding open scores such as
Kurzwellen, Spiral, Pole, Expo and the texts of
Aus den sieben tagen and
Für kommende Zeiten.