Moved the rear shocks to the "extra long" position on the new arms, switched from a G6 to the Alfa and went from 19lb to 24lb springs in the rear. The car rotated MUCH better. I picked up a lap on my fastest time, even with a few mistakes, and dropped my best lap time by .7 seconds. I still think the car has some on power push that I'd like to reduce slightly, but otherwise, it still remained very drivable and was much quicker out of the turns. Several people commented on how nice it looked on the track, which is good to hear. I feel like there's a lot more time to be squeezed out of the car, still, which is encouraging because I'm finally able to hang in there with some of the fast guys, at least for a few laps before I doink it. :-D
And off-topic, but the Spektrum will never go in my car again. The Futaba 2.4Ghz system was like night and day. I found the difference to be profound. Anybody that tells you that you can't sense a few milliseconds isn't driving with foam tires on carpet.