I read here a while back that someone wanted to change his wheels after entering production and he was unsuccessful. I finalized my order on 6/21. Several days later I decided to change from 21" back to 19" wheels (so that I can worry less about curbs, potholes and could use chains on my ski trips if needed). They gladly accommodated me. A couple of days ago, 4 weeks after finalizing, I happened to be at the Century City mall to buy some gifts, when I just "happened" to stroll into the Tesla store. On display for the first time there, was a nice shiny blue MS. I was previously utterly convinced that white was my only consideration. I really fell in love with this blue one though. It seems so sophisticated and even sportier than my white. Maybe a little more of an aggressive look. I called my Tesla rep and asked if they could make the change from white to blue. He was very accommodating again, and asked me to give him a few hours and check my dashboard later. Yesterday morning, I logged in and saw that my blue MS is in production: "Sourcing parts." I am confident that my delivery time will be delayed, but that's okay. I have another 6 weeks on my other car lease anyway.