One of the limitations of SU is that it can be difficult to keep guide lines that might be useful. That is because the Delete Guides command is all encompassing and will delete guide lines even when “protected” inside a Group or Component. A workaround I have found is to Select All, then Select Guides (might require Selection Toys extension) before deleting. That will only select the guides in the current level, leaving those in any nested levels untouched.
I would like to replace the shortcut key I use for the inbuilt Delete Guides command with one that runs the above sequence. There is advice about how to use Automator here but I am not sure whether it can be made to work for what I want to do. The tutorial is 7 years old and I am not sure it still applies. Does anyone know?