well, if you're scared to drive it hard, that makes me sad. you have a sports car, and can't drive it the way you want to for fear of something going wrong. i say, let it warm up fully, then have a blast with it. if it still spudders a bit, when you have nothing else to blame it on, get re-tuned (car being cold, missing a shift, it being an american car etc.) jk bout the last one, btw... looking for a tc myself.

baby it til it's warm, then go all out. if you STILL have a problem, take it back to who tuned it and have them iron the tune out.