Just what I've been saying for years, plug gaps are not at all critical..I just ran a 3W 150, set the gaps by eyeball, somewhere over .020..
Too close and the engine will miss at high rpms. too wide and the same thing...I once cut the side electrode clean off on a converted G62, still ran but missed a WOT...
Anybody thinks a .002 difference in a plug gap makes any difference is kidding himself...