Yes it looks like you need a MS2 chip to run MAF\MAP blend indeed.

But from reading MSextras information it looks like you can do baro with a map sensor constant update if you aren't using MAP, like in alpha n. So figuring that if I use a maf sensor than I maybe I am able to use the map sensor for baro.

Once everything is done and I have all the items I need I will update later, but right now just got the power part of te board done and running correctly.