Hobby Japan
In 1986, there was a dispute with Hobby Japan over the copyright of the series. The magazine dropped "SF3D" from its line-up of articles and Nitto ceased production of various kits of the series. The matter was tied up in the courts for years until Yokoyama was awarded the full copyright to the series in the 1990s. Yokoyama and Hobby Japan eventually reconciled and restarted their working relationship, ditching the old SF3D name in favor of "Maschinen Krieger ZbV3000", otherwise known as "Ma.K".