The one new piece of tech I added was a core of ice at a couple of degrees Kelvin. The scouts were designed to be ultra-low-power, which meant very little heat generation, but I didn’t even want that to show. Waste heat would be transferred to the ice core, which would gradually warm up. I had calculated the heat transfer rate, and I was pretty sure the scouts could make it through the system before their heat sinks gave out and they started to radiate significant infrared.