I like that this shutdown is occurring earlier in the quarter:
1. Stepping up to 5000/wk earlier is better than stepping up to 5000/wk later. It yields more cars built in the quarter.
2. It gives time for Tesla to evaluate the ramp after this change, and iterate again if needed before the end of the quarter to ensure that 5,000/wk is hit.
3. If successful, it will allow Tesla to pass on really good weekly numbers at the Q1 conference call. I think they're going to need to say that they're at least at 3000/wk+ consistently when they have the call to be considered by the market to be on-track.
One additional benefit is that by having the shutdown early in the quarter, production pushes out a week and that could give Tesla flexibility in hitting 200k US cars in July. The note that S and X will be working weekends in June would also align to a Q3 push after hitting 200k in US. Not definite, but gives Tesla more options and flexibility.