You should be fine with your MAFterburner, heck, all I have is the Pro-Flow MAF calibrator and I only had a very slight dip in my dyno curve. I could easily handled it with the Apexi, MAFterburner, Greddy, etc.
No "how to" exists that I know of. I plugged my holes with bolts that fit snugly into the holes and JB Welded them. The holes in between the runners I left open. I know it creates turbulence, but since this was just a test I didn't want to spend more time than needed. Heh, guess it's been a year now, time to finish up this "test".
O2's will get you close if they're accurate, but wide band is the way to go for best performance.
I don't remember if Demon has his or not. I
think they're gone...
