What you can do is set the same root folder for them all, and tell the different *arrs to use sub folders, then use the root folder as a catch all. I can’t remember how to set it up off the top of my head, but I remember that it was pretty simple. <
This is the way I’m set up. One downloads folder and two folders for Sonarr and Radarr respectively that are mapped by them. How do you mean use the root folder as catch up?