I've done about a dozen or so track days with STT, and just signed up for my first time at Mid-Ohio on August 22nd and 23rd. From looking through the tech requirements, everything looks pretty much the same as STT, except for requiring the removal of turn signals in the Intermediate (which I intend to run in) and advanced groups. (STT just requires signals be taped up)
How strict are they on that? Do they really just want you to remove signals that stick way out from the bodywork, or do they enforce the letter of the law and make you remove any and all turn signals, no matter what.
My '15 ZX-6R basically has flush-mounts from the factory, and my fender eliminator pulls the rear signals far enough in that passenger pegs would hit the ground well before they do. They're kind of a hassle to remove, but I'd obviously rather pull my fairings off in the garage at home while sipping a beer than frantically try to get them off and back on again on Monday morning, before the first session.
Random ZX-6R photo for reference (not my bike):