Nett is that are directly double sockets included. For the 2nd star
The problem: The parts are curved, and thick to be installed on standard ground rails with F sockets.
The grounding terminal block is the way of Wentronic, and should actually work with Original Wentronic articles. :
I'm a bit disappointed!
So I must now use a second ground bus and let every 2nd port unused
Looks modest, making more effort and is annoying.