I currently have a semi-custom tune from RWTD uploaded via Predator handheld. If I were to purchase HPTuners, could I read the semi-custom tune currently running in my 04 GTO and see what parameters have been changed and to what values? I ask cause I think my current semi-custom tune isn't bad (speedo is on the nuts and tranny shift parameters are pretty good, too), but I think there is lots of room for improvement. Plus, I have a 2004 Silverado that I would like to tune as well (my 2nd vehicle selection

). Any help here? Plus, I figure once I figure out what they've done, I can sell both my Predator tuners to help offset the cost of the HPTuners....