The screws that hold the 2 halves of the plug together are f#+=ing ridiculous. I have two brand new NCF Furutech plugs that weren't over tightened, they just had no purchase and kept on turning. Their plugs are sublime as far as sound quality goes but they need to do something about the quality of the plastic that the screws connect to.
I'm not alone in this neither, I know a few people who think the same. A small fault, but at the asking price, it shouldn't be there.
Stunning cable, by the way, will handle the current for any mains block, power amp or even source components.
Glws