[8] Castle Technology acquired the proposed designs and the original engineers from Pace to further develop the Tungsten into a desktop computer.

Robert Sprowson, the original hardware designer, declined to join Castle Technology and so Peter Wild was recruited.

[8] A problem for the Iyonix PC was that it used leaded components which were outlawed with the adoption of Directive 2002–95/EC in February 2003 by the European Union.

However, by this time Castle Technology was financially troubled and could not afford to re-engineer the Iyonix PC without the leaded components.

[11] In 2018 RISC OS Developments acquired Castle Technology Ltd including the Intellectual Property.