Tree Strength Rating

[Levi]

What do you all think about this?

http://rigginglabacademy.com/2015/1...l&utm_source=facebook.com&utm_campaign=buffer

At a cursory glance it seems like a dangerous road to go down but the write up is a bit over my head.

 

[flushcut]

Toooo many variables IMO to graph tree strength.