I've got an Air IL and Coil IL. Considering how much you love tinkering with tuning, they're ideal for that.
The Air IL felt great after a TF Tune service, but probably because every seal and even the air can was replaced due to scratching (they suspected side-loading)
The Coil has been impeccable so far, tuning it has a more noticeable effect compared to the Air, I've found anyway
I've got an Air IL and Coil IL. Considering how much you love tinkering with tuning, they're ideal for that.
The Air IL felt great after a TF Tune service, but probably because every seal and even the air can was replaced due to scratching (they suspected side-loading)
The Coil has been impeccable so far, tuning it has a more noticeable effect compared to the Air, I've found anyway