First off, what is the deference between the STG2R purchased after July 1, 2015 that does not require special tune file to start up. and the one before July 1, 2015 that require special tune file to start up? secondly i am ordering a converter this week, i am picking between the Goerend R, The limitless converter, and The Suncoast 1074. unless some one thinks there is a better option. but from my searching those are the best 3 to pick from for the 68mm STG2R. My truck is a 05 lly. stock pump stock injectors, built trans and tuning. i do plan to get duel pumps or bigger single and 60 or 100 over injectors but might be a year or 2 down the road, also i daily drive the truck and only tow occasionally less then 12,000 lbs. anyways what converter should i get and why? i can get the Goerend for the cheapest price and it also has a limited lifetime warranty. But if the others choices would work better than so be it. thanks you!