All I have been commenting on is current demand, under current parameters, and that figure is easy to figure out as we have all the data needed. Now you are saying that demand will increase when people can get their car a week earlier, I acknowledge that this is indeed a positive on the demand side, but as the waiting time already is quite low at least for their biggest market, the US, I don't believe this to be that big of a factor. At least not until, if they even choose to, start filling lots with cars available for instant purchase like Curt has mentioned. I'm sure this would stimulate demand significantly but would also come with an added cost for Tesla.
It is always possible to stimulate demand for a product by either advertisement, lowering the price or bettering the quality of the product, but all these things pressure the gross margin which is already very thin if not negative when accounting for cost not part included in the COGS but still relevant to current sales.