I personally would like to do a 3.5" MAF change but the code work needed is hands on for sure. I peg my 3" M3 MAF all the time during high boost runs but deal with it since the trouble to get it converted to 3.5" is BIG unless I can be at the coders house so he can work on my car. It's that hard to do and i wish someone would do a 3" to 3.5" for the M5.2 so we had it but I think I'm the only one that needs it right now and I don't live near Barrie who is the only coder who is interested in writing code for my car.
Still I got some kick butt code running on the 3" MAF that will spank any I-6 N/A and maybe a few low boosted ones due to my very low weight.