Has anyone else noticed 4 inch circular rings on their glass roof. I have several rings in a perfect line from front to back. Only noticeable when sun hits it at a certain angle. I took delivery of this car in March and really didn't notice it until 2 weeks later. At first I thought it was a cup or coffee ring, but after a wash and no luck removing it, I noticed there were several etched circles on the roof. It appears like damage from a robotic assembly machine. Of course Tesla said it should have been noticed upon delivery, but as I stated it is very faint and only noticed in certain light conditions. I am trying to get a district rep to look at it, but no luck thus far. If anyone else has noticed a similar issue please let me know.