Update KlipperScreen
Go to your Mainsail Web interface then select the Machine tab.
Open the moonraker.conf file and add the following lines:
[update_manager KlipperScreen]
type: git_repo
path: /home/pi/KlipperScreen
origin: https://github.com/Guilouz/KlipperScreen-Flsun-Speeder-Pad.git
env: /home/pi/.KlipperScreen-env/bin/python
requirements: scripts/KlipperScreen-requirements.txt
install_script: scripts/KlipperScreen-install.sh
Once done, click on SAVE & RESTART at the top right to save the file.
You can now click the refresh button (still in the Machine tab) on the Update Manager tile.
You will see a new KlipperScreen update appear, if you see a ⚠️DIRTY update, just select Hard Recovery to update.

Once installed you will have the new version of KlipperScreen and future updates will point directly to my repo like this:

More info are available here: KlipperScreen-Flsun-Speeder-Pad.
Next is to install Crowsnest.