So I had a flat today and had my P85 flat bedded to the SC for new tires. However, they also changed my 4 lower control arms to much stiffer lower control arms as part of a service bulletin (i.e. for free). Not sure if they gave me the P85+ lower control arms, but my car is definitely handling much much better. It just feels much more controlled in turns. I guess the new tires may be part of it, but I think it is mostly the stiffer lower arms.
The new arms were Part "NUT HFPT M14x1.50  ZnAl-W (1004358-00-B)". Anyone know if this is the P85+ lower control arms?
So here is a great example of the car getting better with new hardware, almost 1 year after getting the car. Wow!!! I love Tesla!!!