I am currently receiving Wifi in a metal building wirelessly. I have mounted an antenna on the metal building pointing it in the direction of my Netgear router which is in the main bedroom of the house. I unscrewed and removed one antenna from a Tp-Link wireless N access point device and connected the outdoor antenna wire. The Tp-Link is configured as a universal repeater. Wifi is slow and will occasionally drop out which requires a reboot of the TP-Link access point to bring it back. But it does work so I know it can be done.... I am wanting to replace the TP-Link to a more current version of repeater. I have read the Asus AC68U has removable antennas and can be configured in bridge mode to the main router and wifi will work this way.. Do you think the AC68U would be the device I need for my metal building setup? Thanks... PS- There is no way to run a wire from my main router to the metal building as it is all concrete. This has to be done wirelessly..