its not a big deal, you just sound like a knowledgable guy. would like your insight on these things, so its funny to me when you are looking for answers on it. anyway. i would say go cobra. easy of use and its more than "close enough"that's certainly not what i meant to do. sorry if it seemed that way. just gathering thoughts and possibilities through the range. honestly i wish there was a better fuel controller out there that would simply do what it needs to. but even in the car world no such thing exsists.
OK, but just make sure you get the AFR Probe shoved ALL THE WAY up, within 4 inches of the exhaust port or your readings will be MEANINGLESS, due to after-burn. FWIW..................long enough i've been working on motors, and long story short "feels right" isn't necessarily right. well after all this, i believe the best route is to do a dyno pull and see my afr's. then i'll continue to post my findings.