Hey Beau, my warp connect also recently started swelling. I took the hotspot apart to see what was involved in replacing it and it is pretty straight forward. After you pry the battery up you will have I believe 4 small Phillips screws to take out because the battery connector is located on the opposite side of the board. After that its just a simple snap connection. Just curios where you got your battery from, only place I saw was alibaba.
It looks like 2 of your antennas are for the 5 GHz operation and the other for standard 2.4 GHz. So depending of which one is broken the router should function normally. If this is a office setting with multiple floors and you are actually using the 5G quite a bit you may experience a smaller coverage area. The 5G will penetrate thicker walls but not go quite as far as the 2G .
Is the screw stripped?? I dont know what kind of repair you are doing but if you apply gentle upward pressure on the plate as you try to unscrew it that may help the screw grip and come unscrewed :)
ifixit has quality parts and reasonable prices, if you are willing to take a risk ebay is the cheapest option. ifixit also has lifetime warranty on parts so if its a one time fix they are probably the best bet :)
They don't use glue, they use double sided adhesive that is not easy to find. 3M double sided tape works well but I have had screens come up when using the 3M adhesive. So yes you need to apply adhesive before install of new screen to keep it water resistant. The phone is and never was waterproof just resistant and I recommend using the best double sided tape you can get as you will fudge up the already adhered tape.
Can you use a 5th gen wifi antenna on a 6th gen?
They don't use glue, they use double sided adhesive that is not easy to find. 3M double sided tape works well but I have had screens come up when using the 3M adhesive. So yes you need to apply adhesive before install of new screen to keep it water resistant. The phone is and never was waterproof just resistant and I recommend using the best double sided tape you can get as you will fudge up the already adhered tape.