Now it's time to get everyting to close up nicely. For this I fit the board in, saw where I needed more space, shaved some plastic off with the knife, sanded edges down as needed and rinsed and repeated until everything fit.
I actually had to sand down the solder joints on the bottom of the Doubler to get a few more precious millimeteres of space. You don't want to have to force everything in. Doing this means you run the risk of puncturing the lipo battery. Nobody wants that.
When everything was in I added some hot glue to the switch to keep it in place as. I didn't put any on the board as I did not make an opening for a USB cable to charge the battery.
In my case this is fine as I will be removing the board and using it for many different purposes. If, however, you'd like to make one you would do so the same as was done for the OLED screen.
After some cable managment, i.e. shoving the extra wires anywhere they would fit, I slid the back cover on and it was done!
Now nothing will stop you from getting the MAC address of any wireless device you encounter.