This is what an RN2903/RN2483 FeatherWing would like like. In the render it looks like the pins on the module touch the headers. They don't, but they are very close. I would have to make sure this can even be hand soldered, as I had to make the pads narrower than recommended.
I sent a single GPIO pin from the module (GPIO10) to an LED on the front edge of the board. Unless there's a compelling argument for needing more, I'll leave the rest unconnected to make life easier.
I could also make an alternate version of this board with two u.FL connectors for using both bands on the RN2483.
