I thought I had seen some posts about movement of the Model X driver's seat under acceleration and deceleration. I have this problem (and several others) I hope to have fixed when I finally have my SC appointment on 10/19 (had to wait 6 weeks to get an appointment). I called the SC today to add this seat issue to my list and was told that this has been an issue and is "normal". He told me that "the seat has play in it because the Tesla has a lot of torque and power". I find that to be total BS. I have had all sorts of high performance vehicles including a BMW M5 and several Porsche cars and have never had this problem. Has anyone had this same issue and had Tesla fix it? I cannot believe a seat that moves every time I hit the accelerator is acceptable. And no I don't push the peddle to floor I actually am quite conservative with my driving. Thoughts?