Lord Zack's Planescape
I have had a long-standing fascination with the various planes of existence, even before I knew of Planescape. After learning of Planescape my fascination with the planes grew.
However I have some changes I’d like to make to the planes. It’s not a whole new cosmology, mostly an adjustment and expansion of the Great Wheel. Though I have made it explicit that the Great Wheel is one popular model of the planar structure and there are others.