Add note about fanshim causing problems with uart during early boot that can prevent the system from starting ; tweak docs WRT armor case and fan shim, recommend fan shim over armor case as it's a more flexible solution

docs/pimoroni_fan_shim.md

@@ -9,7 +9,15 @@ sudo -sHu root
 # Move boot serial -> UART5 to avoid colission between UART1 and fanshim
 nano -w /boot/firmware/usercfg.txt
 # Add following to top of file
+
+# Enable uart5 on pins for ttyAMA1
+# Pin 32 : TX (connect to RX on adapter)
+# Pin 33 : RX (connect to TX on adapter)
 dtoverlay=uart5
+# Turn off uart ; fanshim will break boot if this is enabled
+#     Further reading: https://bugs.launchpad.net/ubuntu/+source/u-boot/+bug/1873520
+enable_uart=0
+
 nano -w /boot/firmware/cmdline.txt
 # switch console=serial0,115200 to console=ttyAMA1,115200
 

hardware.md

@@ -10,8 +10,9 @@ This is a surprisingly straight forward project that has minimal in the way of h
 * [Geekworm Armor Case](https://geekworm.com/products/raspberry-pi-4-model-b-armor-aluminum-alloy-case-protective-shell)
   * If you would like an always on fan, select the model with the integrated fan option
 * [Pimoroni Fan SHIM](https://shop.pimoroni.com/products/fan-shim)
-  * This has better cooling as well as on/off support than the Geekworm Armor Case with cooling
+  * This has better cooling as well as on/off support
   * You probably want this instead of the Geekworm armor case with fans
+  * This will **NOT** require soldering to use but assumes you have room to slip the fan all the way down on the main header
 * USB to Serial adapter
   * There are a lot of options, choose one you know that will work well
 * Mini HDMI to HDMI adapter