Hi Cob enthusiasts!
I'm offering a mechanized cobworkshop using a mini excavator, possibly the first time this has been taught, in Santa Cruz, CA Oct 18-20. You can get more information on Cruzincob.com.
I'm happy to answer questions on this forum on my experience with various kinds of machines to mix cob, and we will be having these discussions as part of the workshop. I've attached a copy of the flyer. Please post or forward to people or organizations interested in this "groundbreaking" workshop.