diff --git a/content/SUMMARY.md b/content/SUMMARY.md
index 7ed6860..097d4e0 100644
--- a/content/SUMMARY.md
+++ b/content/SUMMARY.md
@@ -45,4 +45,5 @@
     - [Black pills](software/black-pills.md)
     - [Getting VoWiFi working on Xiaomi.eu](software/getting-vowifi-working-on-xiaomi-eu.md)
     - [Monero GUI syncing stuck with Ledger](software/monero-gui-syncing-stuck-with-ledger.md)
+    - [Resetting TP-Link Powerline plugs](software/resetting-tp-link-powerline-plugs.md)
     - [Test and format SD cards](software/test-and-format-sd-cards.md)
\ No newline at end of file
diff --git a/content/maker-things/installing-bltouch-compatible-firmware-onto-the-twotrees-sapphire-pro.md b/content/maker-things/installing-bltouch-compatible-firmware-onto-the-twotrees-sapphire-pro.md
index c05a0b2..8b75d09 100644
--- a/content/maker-things/installing-bltouch-compatible-firmware-onto-the-twotrees-sapphire-pro.md
+++ b/content/maker-things/installing-bltouch-compatible-firmware-onto-the-twotrees-sapphire-pro.md
@@ -1,13 +1,15 @@
 # Installing BLTouch-compatible firmware onto the TwoTrees Sapphire Pro
 
-I installed a BLTouch/3D Touch probe onto my TwoTrees Sapphire Pro, and configuring the firmware was a bit involved. Here's the process:
+I installed a BLTouch/3D Touch probe onto my TwoTrees Sapphire Pro, and configuring the firmware was a bit involved. The Sapphire Pro has a MKS Robin Nano v1.2 board. Here's the process:
 
 * Clone the [Marlin repo from GitHub](https://github.com/MarlinFirmware/Marlin).
 * Download [the configurations](https://github.com/MarlinFirmware/Configurations/archive/bugfix-2.1.x.zip).
-* Checkout the `2.1` branch (the configurations seem to be tailored to it and I couldn't be bothered changing).
+* Check out the `2.1` branch (the configurations seem to be tailored to it and I couldn't be bothered changing).
 * Replace the `Configuration.h` and `Configuration_adv.h` files with the ones from the configurations zip.
 * Uncomment the `SPRO_BLTOUCH` define.
 * I also changed my dimensions to `X_BED_SIZE 230` and `Y_BED_SIZE 225`, for a more realistic bed size.
+* Enable Universal Bed Leveling (replace the `AUTO_BED_LEVELING_BILINEAR` define with `AUTO_BED_LEVELING_UBL`), as Bilinear was terrible for me.
+* You can also enable the Repeatability Test command with `Z_MIN_PROBE_REPEATABILITY_TEST`.
 * Build with `pio run -e mks_robin_nano35`.
 * Copy `.pio/build/mks_robin_nano35/Robin_nano35.bin` to the SD card.
 * Insert the card into the printer and turn it on.
@@ -16,6 +18,6 @@ I installed a BLTouch/3D Touch probe onto my TwoTrees Sapphire Pro, and configur
 * * *
 
 <p style="font-size:80%; font-style: italic">
-Last updated on April 21, 2023. For any questions/feedback,
+Last updated on April 24, 2023. For any questions/feedback,
 email me at <a href="mailto:hi@stavros.io">hi@stavros.io</a>.
 </p>
diff --git a/content/software/index.md b/content/software/index.md
index ea3fc2a..202b728 100644
--- a/content/software/index.md
+++ b/content/software/index.md
@@ -5,4 +5,5 @@ Click on a link in the list below to go to that page:
 1. [Black pills](../../software/black-pills.html)
 1. [Getting VoWiFi working on Xiaomi.eu](../../software/getting-vowifi-working-on-xiaomi-eu.html)
 1. [Monero GUI syncing stuck with Ledger](../../software/monero-gui-syncing-stuck-with-ledger.html)
+1. [Resetting TP-Link Powerline plugs](../../software/resetting-tp-link-powerline-plugs.html)
 1. [Test and format SD cards](../../software/test-and-format-sd-cards.html)
diff --git a/content/software/resetting-tp-link-powerline-plugs.md b/content/software/resetting-tp-link-powerline-plugs.md
new file mode 100644
index 0000000..97abe57
--- /dev/null
+++ b/content/software/resetting-tp-link-powerline-plugs.md
@@ -0,0 +1,18 @@
+# Resetting TP-Link Powerline plugs
+
+A few years ago, I bought a pair of TP-Link Powerline plugs, and I've been paying for that mistake ever since (the Devolo ones have given me zero trouble). They constantly desynchronize and need to be paired again.
+
+This is the process, so I don't forget:
+
+* Press the button for around 7 seconds, until the lights all go dark and light up again. Don't do this while the pairing light is blinking, it doesn't seem to work.
+* Press the pairing button once.
+* Repeat this process on the second plug.
+* They should pair now.
+* Get Devolo plugs.
+
+* * *
+
+<p style="font-size:80%; font-style: italic">
+Last updated on May 25, 2023. For any questions/feedback,
+email me at <a href="mailto:hi@stavros.io">hi@stavros.io</a>.
+</p>