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I have H&R Super Sports too...really nice stance. As far as the wiggles, I would check the balance, and maybe the bolts in the suspension that you took loose to install the springs.
I doubt it's the springs, I've had them in for almost a year now with no issues. It's most likely the balance but it's just so small a wiggle it feels like it's the actual tire gripping the road and following each bump. I just wasn't too sure since this is my first time driving around with 20's and 35 series tires. I'll probably end up taking it to get check in a week or two just to be sure. Too much damn work to do next week.
You know whats funny. I got the rims and tires mounted with an extra set of TPMS and my TPMS warning still hasn't come on, and I haven't reprogrammed them yet. I thought it might be because my old set of wheels are sitting in the garage next to my car when I start it up, but even after going out last night and starting the car a few times from going here and there the warnings never came on.