Hello, shortly Audi will start production with cars on PPE platform. This means they already have two modular platforms (MEB and PPE)! Does this mean if you buy a car on one of those two platforms you can change your battery pack easily? What I mean is: let's say when car's comes out with battery technology with only range of about 500 km, and two years later batteries are available for 1000 km, can we just change the battery pack. Will Audi also foreseen something that they will take back the old battery pack so you do not need to pay the full price for the new battery pack? Any thoughts about this?