Thanks for your detailed answer. There’s only one wall between the office door and the router, the wall is a typical 2x6 with insulation and sheathing and all that, and the signal there is weak to medium. But once inside the office we can add two more walls impeding the signal and it’s gone. Inside the shed the signal is good so I’m guessing the extender would work, if only having to pass one wall. Otherwise it all comes down to Mercury’s retrograde.