I had to reduce the gap of the 'genuine' (eBay) plugs and was a bit surprised they were out of tolerance. Otherwise, they looked OK, but appearances obviously ain't everything...
Pretty annoyed at the waste of money, time and loss of fuel economy / possible damage of large plug gaps (first pic, close to 2 mm gap).
I have a new set of NGK DFH6B-11A from Supercheap. The gaps are all perfect out-of-the-box (second pic).