Phi Φ The Golden Ratio
Phi is the most pleasing geometric ratio of proportion.
It's found in:
1.618033988749894848204 : 1 = 1 : 0.618033988749894848204
As a Builder, all of my designs incorporate elements used for millenia; the aim being, with both contemporary, and arcane science to build you a better instrument.
STGuitarworks and Φ At Work
Some of the ways you'll see the Golden Ratio at STG are in Guitar Design Proportion, Inlay (+ Phyllotaxis in plants and trees)...
In terms of Set-up work, your Action / String Height setting is determined by your playing style as I understand it and Aristotle's Golden Mean Philosophy.