Most of the fast guys in "no box" release the trans. brake button as well. These guys adjust the "delay" with longer throw buttons and blinders and different tire sizes and starting line rpms. The list is very long for the fast cars in "no box" to keep from going red. A "box" is just a timer to react to the top bulb or pro tree. The average human can react in .3XX of a second where a full tree is .500 between yellows and green. A pro tree is .400 (.500 Super Street only) and I believe they made it like .390 for Pro Stock Motorcycle. With, say, a 2,100lb. Super Gas car, with 1,100 hp, on a .400 tree, you are going to go red every time unless you add some delay to when the trans. brake actually releases. You see the light, you let go, the .050 of delay happens and then the trans. brake releases and away you go. Remember folks, a TON of races are decided by .00X or less. Anything you can do to the car or driver to tighten up those packs will result in a LOT of fun turning on those W lights.