I've been racing my car for more years than I want to admit. I Use a "T" handle on my "H" pattern Hurst shifter that has the button in it. I engineered a circuit, (the term "engineered", is a definite overstatement), for sure, I use the button on the shifter and a separate toggle switch. With the toggle switch off, the rev limiter is in play, but the two step is not, which enables me to do a burnout without hitting the two step. As I pull to the line and shift into first gear, I flick the switch on and now I have my Two step and rev limiter in play. Some guys use a clutch switch, like my son for instance, but I prefer the button on the handle. I've won a few races and lost allot more, as most of us here. I've had my share of .000 and .001 lights over the years. Once you get acclimated to the procedure, it works pretty well. Just my two cents. To each his own, so to speak.