# FAQ

#### After inserting the key switch into a hotswap socket, some of the key switches do not trigger a key press.

Here're some possible causes:

* the leg (prong) of the key switch is bent
* a cold joint at the hotswap socket, or a lifted pad
* a cold joint at the diode

#### **Can I use nice!nano in the keyboard?**

For keyboards that come with a pro micro footprint, nice!nano can be used. Ferris Sweep supports a power switch and a battery solder pad, but other keyboards do not. You should also visit the following links if you go wireless.

* <https://github.com/zmkfirmware/zmk/issues/1110>
* <https://zmk.dev/docs/troubleshooting#split-keyboard-halves-unable-to-pair>
* <https://github.com/zmkfirmware/zmk/issues/278>

#### **What is the best keymap for 40% keyboard?**

To customize your keymap, one way is to learn from the existing keymaps.

Here are some useful links

* <https://github.com/manna-harbour/miryoku>
* <https://precondition.github.io/home-row-mods>
* <https://github.com/qmk/qmk_firmware/tree/master/keyboards/ferris/keymaps>


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