This is directed more toward current Model S and Model X owners, but I'm posting it in the Model 3 forum, since I'm a potential future Model 3 owner. I know Tesla has some "annual checkups" and other sort of recommended minor maintenance. Obviously, the cars will require much less maintenance than a conventional ICE vehicle, but will require some maintenance of wear items such as brake pads, windshield wipers, tires, etc. Typically, unless a repair requires specialized tools or expertise, I do my own repairs and maintenance on my cars, even if they're still under warranty. I just see no rational reason to pay $100 an hour labor for something I can do myself for free for the cost of the parts. How much of a stickler is Tesla about coming in for the recommended checkups? Do they give you a hard time if you haven't come in for a while, or have done your own minor maintenance? Just curious.