I learned this model from Arlene last Sunday while we hung out in the Goldmine/Source/vending area at OUSA. I believe she taught a class on Francesco Mancini's wonderful model. Diagrams appeared in CDO convention book 2012, German convention book 2012; and is also now available for download from the OUSA Source. $2 and $1.80 for members.
I will blog about my OUSA 2015 experiences soon.