Dual Electrode Plugs

I have read numerous "opinions" on the gap of dual electrode spark plugs. Some say they come "pre-gapped" and throw them in while just as many others say to check the gap first. (From the NGK website: "A spark plug part number might fit hundreds of different engines from many different manufacturers. Although the NGK factory will set the gap to a preselected setting, this may not be the right gap for your particular engine.") If the gap calls for .044" is that for EACH side or the cumulative of BOTH sides? ( I read on a post that someone checked the gap and it showed .022" on each side but it called for .044" so he adjusted both sides to .044". I need to know...definitively...do I or do I NOT gap dual electrode plugs? If so, do I gap each side to spec OR each side to "half" spec?

 

Gap is probably set, however I would check and set both to spec. I feel duals are a gimmick.

 

Each side to full spec?