There are no CyberLab Shaders, only Presets (Settings) for shaders made by other people.
You do realize that you are asking primarily about Mega Bezel Reflection Shader functionality but this is not the Mega Bezel Reflection Shader thread.
I hardly use Mega Bezel Reflection Shader anymore so for me to answer many of your questions, I actually have to go looking in the places you should be looking and asking.
In my case, if I have to switch Scaling settings to use a border shader, I just go to the menu and make the change. My default settings are based on what I primarily use.

















































