This article was written as the 6th part of my ThermIIC series, and was commissioned for Archimedes World. However, since Nexus stopped publishing the magazine (the title has since been bought by Tau Press) the article was never published. Rather than letting it gather dust I have converted this part to a set of web pages.
Please note that I retain all copyrights to this material. Personal use of this material is free, but anyone seeking to use these designs for sale is obliged to obtain my permission. Please also read the conditions on the download page.