First, you'll prepare your Feather by soldering on the header sockets. This guide has details on soldering Feather headers.
Next, solder on the headers to the FeatherWing. This guide section show how to solder plain headers.
Be sure to double-check the orientation before soldering. The FeatherWing will insert into the Feather with the flat side of the 'Wing exposed on top.
The case is designed to hold the keyswitches securely (just like the switch plate of a typical mechanical keyboard) while protecting the electronics and looking stylish.
There are openings in the case for USB port, STEMMA QT, if you have plans for expansion over I2C, and the reset button.
The base snaps onto the bottom and give you some surface area to stick on some rubber bumper feet to prevent sliding.
You can print the model files linked below on a 3D printer, or have them printed through a service.
Fit Feather in Case
Align the Feather's USB port with the larger opening on the case, then push the stacked FeatherWing/Feather through the bottom of the case. It should be a fairly snug fit.
Insert the keyswitches from the top of the case into the FeatherWing -- be careful to align the pins of the keyswitches with the sockets of the FeatherWing to avoid bending the delicate legs.
You should push the keyswitches in firmly to make a solid connection with the sockets by squeezing up on the Feather/FeatherWing and down on the keyswitches.
Once the keyswitches are in place, place the case on your work surface and push down on both keyswitches to click them into the case's integrated switchplate.
Base of Case
"All that she wants is another keyswitch..." (Oh, wait, that's Ace of Base.)
Fit the base onto the bottom of the case.
To prevent sliding, put rubber bumper feet onto the base.
Press your keycaps onto the keyswitch stems. You can use any MX compatible keycaps you like -- both translucent and windowed keycaps work particularly well for seeing the NeoPixel under-lighting.
Now, you're ready to play some Osu! or other one or two-button rhythm game!
Or, you can use the Deco Keypad for an keyboard shortcut, such as copy/paste, volume -/+, and more.