Another idea to consider: while it may be contrary to common aesthetics, perhaps support the 7100 above the other equipment in a stack, assuming the 7100 will generate the most heat of any gear in the stack. With the top of the 7100 unobstructed, the concern is allowing air in from underneath. If you are building a standing or hanging support of some type, you might construct it such that there is support (Side-to-side? Front-to-back?) only in the area of the feet (with some room for movement without allowing the 7100 to fall) rather that a continuous surface. I’m sure the Outlaws designed the 7100 with the idea that it would sit on a continuous surface, but given the option, why not allow an even better flow of air? Just make sure the materials/construction can support the weight without risk of injury or damage.