At 6000 miles, I don't think my 05' 636 suspension is quite as well dampened as it used to be. Could be my imagination, not totally sure. Maybe I'm just "used to it" or something. I'm talking about cornering here. Have any of you got to the point where you noticed it and definetely decided it was worn out and had to go? How many miles? I'm thinking about an aftermarket rear shock and a RaceTech fork re-valve.