Here’s a link for a do-it-yourself Golden Mean Tool:
http://www.spyrock.com/nadafarm/html/gmtoolkit.html
And a Golden Proportion Guage for purchase:
http://www.goldenmeangauge.co.uk/trolleyed/2/index.htm This is being
sold as a dental tool for making teeth the right relative
proportions (!)—student version available…:
Have fun!
Janet in Jerusalem