For Y they are just going to stamp the whole frame out in one fell swoop.
> Another new innovation revealed in the patents is a “Multi-Directional Unibody Casting Machine for a Vehicle Frame and Associated Methods.” Musk himself let this cat out of the bag earlier on by revealing the new casting machine will be capable of casting almost the entire body of a Tesla EV in one piece.
> This startling innovation will virtually eliminate the need for a tremendous number of welds across an EV body.
They also reduced the total length of wiring from 1.5km to 100m in the Y.
