Otto is the founder of FREMO, the leading european organisation of modular model railroading and was its president and the editor of its magazine for the first couple years.
In later years Otto ran his own publishing firm and edited the magazine MITTELPUFFER, specialising on narrow gauge model and prototype.
The magazine was closed by the end of 2006. Otto wanted to have more time for his model railroad activities.
Together with two co-autors Otto edited a book on the narrow gauge railroads in the Harz mountains. Currently he is preparing a second volume.
In MIBA-Verlag Otto published a book on layout planning for realistic operation.