Hi Jerome
Exactly, you described very well. My purpose is to install this system in a car using Poynting MIMO-3 antenna (actually I use two of them, one for each RUT). So, I will be able to utilize RUT's WiFi output connected to MIMO-3 antenna. Actually I already did this system and its working well. Only this configuration is missing. Right now I am using the RPI's WiFi, but it is not really good in terms of signal strength around the car, quite limited to inside the car only. Did you like the idea?
Cheers,
Daniel