Any given production system, you design it for optimal output and then you aim to improve efficiency, reliability, quality, and so forth at that output. But the Model S and Model X system as we said last year, was designed for 100,000 units, and now initially to get to that rate, we have to use a lot of overtime, a lot of expediting, and that affected our gross margin on the car. And now we're sort of at steady state with kind of the top part of that S-curve that we're targeting. And so now focus for Model S and Model X is improving production efficiency, continuing to improve quality and...