Had an issue with mine idling at about 1300-1400 when i first put mine in, called them up sent it in for free and they adjusted the TB. That was 2 years ago, never had a problem since and idles at around 950. Love it!
I have an Accufab SBTB and I can say the throttle applications feel different than the OEM TB. it was buggin me enough that I did some sniffing around under the hood and came up with a mod to avoid the on/off sensation without affecting the crusie control.
I have been testing the part I came up with for a few weeks and I love it. However, it was a bit of a bitch to make on my own. If it works out I may try and have a few fabricated and maybe even consider selling them??? (not sure about that yet).
Clearly there is a design flaw in the accufab Tbody when it is installed on an 03/04 Cobra with a Whipple. I expect it is the same with an Eaton.