Thanks for the add. I have been chomping at the bit all weekend to access the $42 definition files for my ecu. I have been very curious to see if the ones that have been added here differ from the ones on the Tuner Pro site. Anyway, I am a newbie to tuning but today I managed to burn a chip for my 1987 V20 Chev truck. It seems to run out ok but time will tell. Some data logging and some tweaking and maybe I will create a tune my engine is happy with.