Tadaaaaa… My final TTN gateway in a remote location is set up and here to stay.
I originally have a RAK2245 hat and a Raspberry pi 4 setup for a few weeks now.
But the Raspberry pi 4 got very warm so I had to add extreme coolers.
I did buy a RAK 2245 casing, but it turned out that the Raspberry pie 4 does not fit.
I had a Raspberry pi 3B laying around, but I damaged it when I screwed in the backplate and left the SD card in it. It tore the SD holder from the motherboard.
I finally decided to go to an official Raspberry Pi3B+ packet + charger and now it has a a solid raspberry pi, a solid Raspberry pi charger so this one is going to last 100 years 
I wonder if my antenna can get better range now that the board in enclosed in a all metallic case