A solid week of messing with it and I can see a light at the end of the tunnel. I have most of the sticky stuff fixed, waiting for a FedEx package from Daniel, wish I knew before starting what I know now, but thats the price DIYs pay. Took the shocks off and as far as I can tell the upper mounts are not the source of the rattle in the back. I still can tell any difference with Sport on or off, feels like Sport is on all the time. When I go to Brians he can set the shock parameters on the SD2, hopefully it will make a difference. Side note: I called Bilsteins repair facility in SoCal and yes, they can rebuild 550 shocks, $100 each, 2-3 week turnaround. Thats good news considering the cost of new shocks. Took it to be smoged today, passed so next I go to DMV and register it. Next big step is tires, Im leaning toward Michelins, I want a comfort in a tire, not performance. The 355 has plenty of performance, this cars for comfortable cruising. Michelins might also alleviate some of the bumpy ride Im getting.