Where are you located?? Vivid uses softronic as far as i know so really its not their tune.. What i do know is i havent had any issues with Evomsit software being picked up at the dealer.. I will be posting a before and after dyno graph tomorrow of the 997 Turbo Evomsit reflash and maybe that will help you better decide.. any questions feel free to ask!!!

Here is the before..
https://teamspeed.com/forums/997-996...e-results.html

Mike