Just wondered about the WiFi (HotSpot) performance when the board is surrounded by all the metalwork? I am presently using the Flirc aluminium case which has a plastic bottom cover. Temperature outdoors in 10°C weather is less than 30°C and 5GHz WiFi HotSpot works fine over around 5-8 metres.
Currently running KStars/Ekos/Indi on a Raspberry Pi 4B 2GByte under Raspbian thanks to AstroPi3 Script
Sky-Watcher ED80 Pro with 0.85x FR/Corrector with Canon DSLR on AZ-EQ5 GT mount
Other Sky-Watcher scopes - SkyMax 150 Pro Maksutov Cassegrain and Explorer 150p Newtonian