This is what I "heard," so take it with a grain if salt. Musk is heavily involved. He does hire excellent plant management, but then he grinds them and they leave. If plant management rolls over before good process management is in place, the result is inconsistency. All other car companies are utilizing six-sigma, and they apply it to everything, and that includes fit and finish. Last year I took a tour of the Mercedes plant in Alabama. I expressed my amazement when a vehicle reached a certain point, a bumper slid down to the vehicle. That bumper came from a tier supplier. The bumper matched the car's paint exactly. When I did express my amazement, the plant manager looked at me with surprise that I was shocked. He told me that they hold the supplier responsible for delivery, quality, and the right build (some have sensors and some don't). The Model 3 is without a doubt one of the greatest cars I have ever driven. I just believe that Tesla can do the paint and fitment properly if they want to. I am not sure why they don't. My post is not bashing. I would like to see the Model 3 where none of them have paint and fitment issues.