I like this approach moving forward. It seems to have been pretty accurate in the past, keeps the downside surprises in check, and upside surprises would be just fine. However, guidance is for quarterly exit rates rather than production, and this doesn't appear to help forecast the exit rate. Tesla's production rate typically drops for the first part of the quarter from the claimed exit rate of the previous quarter. During the middle of the quarter, it rises to the level of the rate at the end of the prior quarter. It then goes up from there in a burst in the last few weeks.
Edit: Just saw in your last sentence that it does predict the exit level for the next quarter at 2x the claimed previous. So the estimated exit rate for Q2 would be 4,000 then. When does this pattern stop? I'm assuming this would not continue that pattern in Q3. Otherwise, the exit rate would be 8,000, which seems much higher than I would expect at that point.