First of all, thanks for this really nice feature! Installed it yesterday and my boss instantly liked it 
Now it would be nice if you could add the possibility to grant access to certain KBs only to specific groups like it works the same way for tickets. Problem is, our technical service uses Zammad as agents as well as we from the it department do and this way they can see our KBs, which they not always should.
Again, thanks for your great work! Much appreciated 