ZL2TWS: Pi-Star now running on Odroid XU4 on an Internet labs DVAP. Hotspot to hotspot with over night updates disabled. Add my own hotspot destinations. See here: zl2tws.ddns.net:84
W5ZIT: I have 2 Zimmerman USB and 4 Pi-Hat modems in service and there is no difference in temps. We cool the Pi-Hats from the side opposite the GPIO with a small fan and rarely see over 100F on the Pi.