iridium spark plugs - code please :)

[darrsi]

I purchase some ngk iridium spark plugs from flebay.
The seller says that the gap is 0.6mm,do i have to regap them to the yamahas specs(0,7-0,8mm).
I search the web and i saw that it is very dangerous for the iridium tip

I very carefully gapped mine to 0.75mm, then read about the warnings months afterwards, never had any issues at all, and that was a few years ago.
We're talking about 0.15mm, not a hammer and anvil job.  mash