diff --git a/PISETUP.md b/PISETUP.md
index 7b6c5bc..764b5a3 100644
--- a/PISETUP.md
+++ b/PISETUP.md
@@ -1,4 +1,6 @@
 # Setting up the Raspberry Pi boot image
+This guide is for setting up a _brand new_ Raspberry Pi _from scratch_ for use as the FOXSI-4 Formatter. If you are just trying to modify/build/fix/run the Formatter software, [go back here](https://github.com/foxsi/foxsi-4matter/blob/main/README.md).
+
 ## Supplies
 1. Rapsberry Pi SBC (versions 4 or 5 will work, as will a Compute Module with carrier board)
 2. microSD card with capacity ≥ 8GB
@@ -84,6 +86,17 @@ Now reboot the Pi to implement your changes:
 $ sudo reboot
 ```
 
+### Disabling WiFi
+For flight, you may not want a WiFi interface floating around. You can disable WiFi by adding `dtoverlay=disable-wifi` to your device tree:
+```bash
+$ sudo nano /boot/config.txt
+```
+and add the lines
+```bash
+dtoverlay=disable-wifi
+```
+Then you can reboot to implement the changes.
+
 ## Installing required packages
 Assuming you have an internet connection, you should be able to use `apt-get` to install some required libraries for the Formatter. Some of these may take a few minutes to install.
 ```bash
@@ -95,4 +108,4 @@ $ sudo apt-get install googletest
 
 The recent v1.83.* versions of `boost` are not yet (as of March 2024) available in the Debian distribution, so I specify an earlier version for the Raspberry Pi install.
 
-Once complete, you may need to modify the [CMakeLists.txt](CMakeLists.txt) to point `NLOHMANNJSON_ROOT` to the correct directory. The path you input should contain the file `json.hpp`.
\ No newline at end of file
+Once complete, you may need to modify the [CMakeLists.txt](CMakeLists.txt) to point `NLOHMANNJSON_ROOT` to the correct directory. The path you input should contain the file `json.hpp`.