imo cutting the stock shifter is a bad idea, you're not reducing the throw, your only reducing the height of the shifter, the main premise of twm ss is the leverage point is changed as well so that the throw is reduced. you can see it in their website, they have an animation under the FAQ.
anyway, my gf is buying me one, she said I barely use anything she gave me so buying me an ss would ensure i have something she gave that i use everyday...hehehe works out for my and for her. So question, would i really essentially need a weighted shift knob to facilitate a better shifting experience? people with ss and weighted (300-600grams) shift knob please chime in.