From the pic, it looks like the earth pin is longer than the other two, so as it makes contact first. That could impose a side load on the earth contacts before the plug gets aligned properly. As such, as you say, this fault will exist on a lot of other sockets. It looks solidly built, with good size brass screws and copper sections. Is there any function to the strange 'overlap' feature at the back of the pic?
And did you cut yourself taking it apart, Mike?
