That's odd. I know of at least one guy here in SATX that does custom tuning (Fiesta specifically) but there's some mixed opinions on him and I'll leave it at that. What most of us do is e-tuning. It's super easy and gives great results. Some of the main tuners are Tune+, Dizzy, Stratified Auto, JST. Give them a search and you'll see they're super easy to work with. I'm currently tuned with Jason @ Dizzy Tuning but have worked with Stratified on other platforms.