Originally Posted by Lord Quas
I have been coming across this bricking of the ecu if the tactrix goes out in the middle of a flash and im wondering if i should worry about this.
You'll only brick the ECU if you turn the key off before getting a successful flash. You can flash, fail, flash, fail, flash again, fail, go inside, have a snack and a 6-pack, come back out 2 hours later, flash, fail, flash, success - and as long as you don't turn off the key anywhere between the first fail and the final success, you're fine.
I've only had a flash fail once (well, one "event", but it was about 10 failed flashes in a row), and it was because my car battery was low. I just left the key on, left the laptop and ECUflash running and attached, hooked up a battery charger to the car, hooked up the laptop charger to the laptop, went inside for a couple of hours, came back out and flashed it again and it was fine.
Just don't turn off the key until you're 100% sure the flash was successful.