Clover to OC and Catalina to Big sur. Remove Catalina debris?

Been happily running Catalina with Clover, but it's time for Big Sur. Have already created what I believe to be a good EFI folder and config.plist. HOWEVER... as I recall from looking at this months ago, there are bits and pieces of Clover scattered around my drive, not just in the EFI volume. Some things in .etc ? Some things left over in /Library or /System extensions? Perhaps other places?

Can anyone here give me a list of those things, so I can delete them? Much appreciated!

Author: kentval