Sorry you had to learn the hard way.
Kids, I know there have been a few individuals who have ported their meters and then have claimed improvements or that "it worked great". Chances are they likely had other mods which made the stock calibration less than optimal and when they ported out their MAF meter, they lucked out and perhaps it did run better. That said, unless they have the proper measurement and calibration equipment and was able to transfer that new information into a chip on their computer, their tune is off, despite their "improvement" claims. Be careful of what is on the internet.
Pro-M not only has OEM meters you can purchase with the correct calibrations for your application, but can also recalibrate your existing meter for changes in injector sizing. Switching to an OEM 70mm MAF meter is a great way to upgrade your intake system, but make sure that the calibration is correct for your application or else you can have all sorts of drivability issues and certainly, the engine will not be running optimally.
Bottom line is that in order for the engine to run properly, the MAF meter calibration should match the injector size AND the computer should be re-calibrated for, at the least, the new MAF meter voltage table. Too many folks stop at the new MAF meter and end up with a crappy tune...even when they may be making more power.