Chris,
The '-11' plugs are the 1.1mm gap for memory... (IIRC).
Would have thought the normal plugs, (not -11 extension), would have been the norm....?
Closed to a more 'popular' 0.8mm gap? (Still in the colder number 7 plug though. Either in the platinums or the iridiums). And yeah, what numbers (lambda) are you pumping out with the 800's?
Brent.