John,
The battery swap did most of it for me, and what little fluctuation was left cleared up on its own. Don't bother doing any more throttle resets, just let it figure itself out.

The EC tune is going to make a big difference I imagine. I kind of wish I had gone back to stock for a few days before having them change the tune from the pre-mod upgrade to the post-mod upgrade. Either way, they do some good stuff.

Unfortunately for your disease, unless you have an SRT, there isn't much else we can do to the crossfires. Bolt in exhaust and CAI... There's a project in the works for the Ground Control suspension setup... and I hear in 2 weeks there will be a prototype turbocharger out on the streets...