So my thinking is becoming clearer. It's looking like, if I don't get the Signature (I haven't decided for sure yet), I can save $3550 + $2000 (19" aeros instead of 21") + $1500 (plain white instead of pearl white) = $7050. I actually prefer non-perforated leather on the seats, so I win there. For the savings, I can almost certainly replace the polyester door and dash upholstery (if it is polyester) with custom leather at an auto upholstery shop; door and dash upholstery has got to be a lot simpler to do than seat upholstery. It'll probably go some ways towards paying for a beautiful, flashy, unique custom paint job too. And a car with actual custom interior and exterior, and a "story" ("eccentric owner who was allergic to polyester") really *does* sell for more in the resale market, in contrast to "signature" models, which don't. The delay in delivery will be sad (not to mention the extra time for the custom work), but I'll get a much flashier car, and I'll get the exact one I want. Regardless of which model I get, I may be trying to replace the floor carpeting as well (if it's polyester), which seems like a substantially more complicated job from the research I've done. However, I've never actually done any of this before. Does anyone have any experience with custom aftermarket upholstery work (including carpeting) or custom paint jobs (particularly on aluminum), who would care to share hints? I'm not sure how best to order the car if I plan to repaint it (are car companies willing to ship cars in primer? or specify no wax/sealant over white paint, so it can be used as an undercoat?). Consider this an open thread for anyone considering custom aftermarket work on their model S.