I was asking a more fundamental question... stamp machine or cut-n-bend machine requiring no die, or other. We don't know was my point but I do expect they will take the tooling route and reuse what they can. Many good ideas in this thread actually."Stamping Dies" specifically are the long-lead-time items for tooling. Especially so since both the Model 3/Y for GF3/4 could just be additional die orders for the existing pattern first built for the dies used at Fremont.
I'll defer to @Krugerrand for a timeline on die production, but I expect a 2 year buildout at Giga Shanghai Phase 3 to go 'watermelons-to-millions' (of Models 2).
Cheers!
(OT - To be fair, I studied for years under both Dutch and some German Tooling experts in my past. Now I'm planning to buy some molds of my own at Proto Labs but would rather have them in my garage.)