[DJ_Izumi]

Love the tiny form factor!  Ahh the days when I used to have the patience for modding hardware.  Bummer that Lenovo limits what hardware you can install - on the plus side there are plenty of tiny USB 5 GHz Wifi adapters available.  The one I bought for my Dell has a 3" detachable antenna so probably not going to be suitable for your portable needs.  It suits my needs however because I get a strong signal all the way on the other side of the house and through a wall.

The good news there is that I don't have to use USB, I just have to get a white listed Lenovo 5ghz AC adapter and plenty exist.  Thankfully there's lots of Lenovo laptops and other machines from this era which have have been gutted for parts that are not on the used market.   It'll be about $20 to get that part.