I noticed the video didn't actually SHOW it being used in heavy clay soil like Sallymander and I have here in the Willamette Valley. Maybe it would work on some of the massive weeds we get in the lawn. In fact it gave me an idea... spade blades come in many diameters and this could be a good organic way of eliminating some weeds (if one can go deep enough).
I'll have to charge my drill up and give it a shot and hope neighbors aren't watching, they think I'm crazy as it is.
