Tuning is somewhat similar in car racing. You can get general settings to keep you on the track, but only the really good drivers benefit from all the little tweaks we discuss ad nauseum on the forum

Spreader rake (as an example) won't make you any faster than you are already if you don't already have a good technique for boathandling.

A blown tack/gybe/rounding/start will influence your overall performance far more than an incorrect batten tension.

I think we all talk about the tweaks here because few of us are big enough to really admit we suck at sailing and don't spend time practicing

I know that doesn't help much, but maybe T-back or Matt can take a look at your settings next time you're at T-winds...