I really like EvoScan, but I like having the Tactrix standalone logging even more. with the correct logcfg.txt file stored on a microSD card in the Tactrix you can have it log all the time or onl when certain paramiters are met, such as going above 75% throttle to start logging and then stop after going below 75% throttle. I can even pull the SD card from the Tactrix and put it into my phone and view the .CSV file on it and make notes on what needs to be changed when I get back to my laptop. This is really handy if you have the Tactrix plugged in, and accelerate hard to get on the interstate and see the CEL come on. on the 3S ROM the CEL can be set to come on when the PCM sees so many counts of knock (which is configurable, I have it set to come on at 2 counts or higher).