I believe part of the hidden variables fall within the injector tables, namely the off-set table, hence the fudgin in the air mass tables.

Given that something has to be fudged, I'm way more comfortable setting up the fuel mass tables to a known constantan and utilizing the air mass tables for fudging due to the higher resolution available in the air mass tables.

BUT, I like Jeff's out of the box thinking and am willing to give it a shot.

Even if a tuning bible were available, we'd each develop our own methods of tuning based on our interpretation of the bible. So long as our methods delivered consistant results, they'd be no better or worse than the next guys.