I pulled all the plugs last night and tightened the gap to .30: run it again for awhile and see what happens.
Good luck.
I'm still thinking about drilling the hole in the throttle plate....
Something to think about; The computer is always trying to hit the programmed idle speed and uses both air flow and timing to get there. If you drill the plate allowing more air in and the computer can't control the idle with the IAC, it will do it with timing. So it could pull too much timing out at idle.