In the early 70’s, the Australian magazine Electronics Today International published Tervor Marshall’s designs for two partly digital, mostly analog, Electronic Music Synthesisers. the ETI 3600 and ETI 4600. Both were made available as kits of components. Barry Wilkinson at ETI was responsible for the final packaging and kitting coordination. Maplin Electronics Ltd.(in the UK) subsequently picked up the designs, which they marketed as as the Maplin models 3800 and 5600s Electronic Music Synthesizers.