the “stones” modules (http://www.smartslope.com) have holes in the bottom of the module, which a Maccaferri (Italian Co.) grid reinforcement is sewn through, which provides one of the strongest connections in the industry, for what that is worth. The extra excavation for the grid is costly, but necessary at that height. I am happy to help, if needed; after all my title is the “sales guy” for SS & Furbish Co. Peace.
