Sorry guys- just got back from a ski trip in Colorado.
Last week I replaced the WB sensor and Max and me did a few log & learn runs. The WB cured Maestro not reading the AFR, however, we were having a strange problem where the car makes power up until 5k correctly then pretty much nothing until 6k and then pulls like a freight train to 7k. In that drop off (5-6k) it has perfect AFR's and holds 20psi.
Spoke to Max last night and we're going to schedule some more time to figure it out now that I'm back.