My guess is November 2021? First, give Giga Texas 11 months to build till the end of July, then three months to get over the new instalment of "production hell" because in the one factory are two largely different vehicles than the cars. Although Tesla is great at manufacturing cars now, there would have to be some really new learning curves for the Cyber and Semi trucks at scale. Which at a guess will take 3 months to sort out (please give Elon a comfy bed in the factory!) 20 Semis in August, 30 in September, 49 in October and our 100th in November. Thoughts?