From the latest Jeff Lawton video 'How to Create a Permaculture Design'. Via Dan Halsey of South Woods Center, they showcase this excellent tool. My wife and I are in the planning stages of our future food forest. To have come across something like this, so far in advance is quite something. I didn't see anyone else having posted it and felt it was best to get the word out.
Location: Australia, Now zone 10a, costal, sandy, windy and temperate.