Important issues of complex computer systems often become apparent only with applications. Thus, the authors developed the <hi xmlns="http://www.tei-c.org/ns/1.0" rend="italic">KBSET</hi> system, an experimental platform to clarify the precise requirements of machine support for scholarly editing and to experiment with advanced techniques. It follows the outlined approach, but, so far, only realizes some of the discussed aspects. A draft version of an edition of <hi xmlns="http://www.tei-c.org/ns/1.0" rend="italic">Max Stirner: Geschichte der Reaction, Band 1. Berlin, 1852</hi> accompanies it as comprehensive example. The system is free software and available from http://cs.christophwernhard.com/kbset/.