So i had a bully dog triple dog....but have had several tranny issues. now im in the market for a tunner. Sct seems to be the way, but there is so many conflicting opinons on here. some are saying the live wire in junk. but x3 is the best. i thought they were the same other than the gauges. I need tunes that have great tranny life. Do any of these let you build your own tune.