I hear ya, my impression is that the ATT is a well purposed, easy to install, and properly supported aftermarket option to replace/upgrade the GMX turbos with something more capable for the 6.5TD. It makes sense for me as a DIY'r with limited time looking for a practical option that won't take a ton of messing around to get set up. I will most likely be purchasing one soon and I intend to take some before and after data to provide yet another point of reference for people like myself who, in the future, come here to look for a reliable review of exactly to expect. BTW: I believe the ATT's are now listed on ebay.... Good for Slim or whoever is the stakeholder in this venture. As a business owner myself, I've found ebay to be one of many tools that are well suited to increasing exposure and awareness of your product in addition to sellind a few extra units. Cheers and I'll check in later!