With the current plan of delivering, at best, NA Signature MX in 2015, the goal of 50K delivered MS/MX seemed to be increasingly unlikely. The problem is that new BIW line is being used for slow ram-up of MX. The "old" BIW line which is producing MS was maxed out at 1100-1200 cars, with OT (as compared to a standard 2 shift operation). In reality, in terms of an average output, I think that existing line is maxed out at 1100 cars per week.
So, taking 12 working weeks/quarter (given the history), maximum production of MX seem to be limited to 13,200 cars. Even if we assume that all these cars will be delivered, the total MS/MX deliveries in Q4 are likely going to be limited to a maximum of 14,500 cars, resulting in a substantial 2,500 cars miss as compared with minimum guidance of 50K cars.
Theoretically, of course, it is possible to pull the rabbit out of the hat by may be not producing MX on the new BIW line, freeing it to produce MS, and then switching back to producing MX, but this will require tuning of the new BIW line, they can't just use new BIW for 4 weeks producing MS at a rate of 1,000 cars/week. The only way this can possibly work IMO, if they decide not to deliver any MX this year, and try to run existing BIW line at a steady 1,000 cars/week, while also ramping MS production on the new BIW line. This scenario, however, would produce noticeable drop is the estimated MS delivery times, which so far is not the case, with estimated delivery times actually increasing in the last several weeks.
So I am not very optimistic regarding the Q3 earnings call. I think that Tesla will need to share their outlook for Q4, and they will most likely lower it to perhaps 14,000 cars, with 2015 guidance lowered by about 3K cars to 47K.
The issues with this MX ramp up are relatively mundane in a bigger scheme of things, but given that this is a short term thread, I suspect, with all the shorting activity and hysteria ignited by constant bear crescendo, I am afraid that visiting sub $200 is not out of the question.
The long term outlook remains very good, but I would advise caution in the short to medium term.