1) That's their estimate of the eventual maximum. There's no evidence that I know of they've yet hit even 1/2 of that number on the first line. Otherwise production wouldn't have been in a battery pack limited state. 2) If you could run the first one at it's current best rate while installing the other. Thus my prior comment about it not being surprising if they'd have to put the existing production capability into at least partial turn-around while installing the new stuff. This wouldn't be surprising, moving things around in and out of the factory and working on electrical services and such, taking bodies away from the other line to work on getting the new one up, focusing managing time, this all would likely impact production speed.