What's the requirement for being able to plot to revoke a county that's not in your capital duchy again? I keep forgetting. As Wales, I have:
An ambitious Anglo-Saxon count of Chester and Lancaster (both duchy of Lancaster) I would like to get rid of (he's magically running Primo rather than Gavelkind too, cheaty bastard), can't plot againt him. He later inherited Bedford (duchy of Essex), and I still have no available plots.
I also have a count of Leinster (kingdom of Ireland, obviously) that randomly inherited the county of Kärnten (kingdom of Bavaria), and I can plot to revoke that (but have no intention to, it's so remote, I will lose it to rebels or Karlings eventually, who cares?). Do counties really have to be in a different kingdom (or even empire?) to do that?