Poink88
Imperial Masterpiece
I've heard of people using organic soil, but never inorganic substrates. I know on ancient Oak's when a branch is too heavy and the weight lowers it onto the ground, the touching part ground layers. Junipers do the same thing. Essentially, its the same idea as doing an air layer with dirt. I just haven't heard someone use bonsai mix for it before.
I think you are confusing bonsai mix to inorganic. Bonsai soil doesn't mean 100% inorganic always. My "soil" mix is approximately 30% organic.