I just wanted to post a shout out to one of TMO's sponsors, Optimum Performance, for their great customer service. I found myself in need of the small bolt that threads into the end of the sliding pins for a rear caliper on my S550. After contacting more than one dealer in my area I found that it would require ordering a caliper retaining kit for over $50 bucks just to get the one bolt. I then remembered that Tim from Optimum Performance sells O.E. calipers with the high temp silicone dust boots and takes cores for credit. So I emailed him asking if he happened to have one lying around that I could purchase or if he new where I could find one. A few hours later I get an email with a tracking number saying the bolt is on the way. It's customer service like this that keeps me coming back. It's hard to find good businesses that you like to deal with and I just wanted to give them a shout out to let people know.