Whilst scrapping more plastic I was listening to the HHGTTG audio books - a valiant attempt at all 6 books of the trilogy - it struck me I've never even heard of, let alone seen, a Heart of Gold...
Does one exist, either the 81 or 05 version, however improbable it may seem?
.....
For the uninitiated:
HHGTTG
Heart of Gold (1981)
http://vignette1.wikia.nocookie.net/powerlisting/images/e/e8/Heart_of_Gold.png/revision/latest?cb=20140802061622
Heart of Gold (2005)
http://vignette2.wikia.nocookie.net/hitchhikers/images/9/9f/Heartofgold_exterior1.jpg/revision/latest/top-crop/width/195/height/195?cb=20080507001801
Infinite Improbability Drive
http://science.howstuffworks.com/10-fictional-spacecraft-we-wish-were-real4.htm
If there isn't then...