Phi Caliper

These are Phi Calipers which I made using the formula Phi=((1+sqrt(5))/2)=(a/b)=((a+b)/a). There are many great youtube videos that you can search and explore the many wonders of Phi.
I made this to test part warp (long flat parts) on my new heat bed (Cetus MK3 Ext now with Heat Bed Upgrade).