I've see modified launch control kits fitted to WRX's that allow safe flat changing, perhaps someone out there has a similar kit that can be fitted to the corollas. The kit I saw on the rex was tuned to the car's optimal torque/power rev zone, in this case it was 4000 rpm, it was very simple and cheap. When the clutch is depressed a solenoid is activated that triggers the modified ecu to cut back on ignition timing and fuel delivery, so sitting at the lights (on a track) with the pedal to the floor the revs were not exceeding 4000rpm. To launch was simple - side step the clutch, the engine is at optimal power and a perfect takeoff easily done. Gear changes same process, keep the gas floored, depressing the clutch cuts back the revs to no less than the set revs programmed into the ecu, change gear and off you go again. APS made this kit for turbo cars, someone out there has to make a similar one for NA cars such as corollas. ;)