You clearly didn't read the part I wrote about air velocity through the MAF and how it was altered due to the new air box. But by all means flame away.
I read it.
But I've had so many meters and intakes i can't even remember them all at this point.
Not one quality meter, ever suffered from a velocity or turbulence issue.
Pretty much all have mine have been some iteration of Pro M (regardless of what name the company was at any point).
75's, 77's, 80's 90's etc.
I've also run a far far wilder tfs setup. Guess what? Idled and ran fine.
It's a stock intake, if a meter doesn't work with that, someone should just use a different one.
You suggested you have proven tuning works.
I feel like you have proven the opposite.
You made 300rwhp with a tfs top end (you can even get close to that with no meter or injectors), which is about the norm untuned, so i'm not sure there was any power there (especially with a valve job thrown in) and you fixed a mechanical problem with tuning which is fine, but IMO it makes no sense.
I don't know the software system tuning or costs you incurred, but i bet it was more than a better meter.
Noobz and i see eye to eye once in a while and i will concede that tuning may have it's place (that place being supercharged or turbo applications).
But fixing a surging idle with a TFS kit with a stock intake is not one of those places.
Personally what bugs me most is the "need a tune" comments or people who using tuning as a repair.
It's not personal, but your assessment that tuning works because your surging idle went away with what is one of the most basic setups is ill conceived.