Receiver Feet Risers

I came across a audio setup in a cabinet where someone decided that using whatever they could put there hands on as a way to separate components to keep them from overheating. I thought this was crazy and since I now have a 3D printer I could do better than scrap pieces of wood and little cardboard boxes. Version 1 has more of a faceted outer shell and version 2 is a bit smoother. I would recommend putting adhesive felt or cork on the bottom to keep them from sliding around and scratching the