I am looking at a Dmax soon and all I hear about is how EFI Live is the way to go.... so I do some research.... The only way to contact them is email (They don't want to talk to you) You can't get a hand held tuner alone, you have to go to an authorized reseller and have then tune the truck first, if they do a horrible job your engine can blow up or run crappy, if they do a good job, life is great.... (They do not have quality control over their authorized dealers and tuners) Their authorized dealers are spotty..... there isn't even one in each state, but some states have 4 authorized dealers. Should I just use the Diablo Sport Intune I have for my gasser and keep the tuning on the "safe" side.... when I go diesel. I called 15 authorized dealers over 12 states and every single one required me to leave a voice mail, some of them sounded like they work out of their basement... (really reassuring) ....Am I going to trust you with my truck, probably not. Right now I am really turned off by the amount of information and quality control by EFI Live.