Just came from Kia after work today. They adjusted the air mix so that my rpms are a little higher now -no stumbling now. As for cold start -coincidently to what you just said Fokion, I found out you need to give the gas pedal a decent pump before startup - I had misunderstood the guy earlier and thought he meant just a little nudge. I'll try that tomorrow. Everything else -steady idle, quieter engine, better acceleration, has been very worthwhile.

Oh yeah -almost forgot. found out they didn't gut the IAC -they just removed the female side of the connector where it plugs in.