This from EniLab @GCZ on the Z29....
"It's only a prototype - built in only one edition.
They are not design exercises - just a ad hoc designs for working prototypes - this one particulary (like I said before) is for testing lightweight body structures.
The technology is still not ready yet. The car has combined alu - carbon fibre body construction which is very expensive to repair after the eventual crash - even further: the abnormalities on the structure are very hard to find, and they can be only finde by a very expensive method. Neither the crash impact consequences are fully researched. But BMW engineers are working on proper solution - but as you know time is needed (and money of course). And when the solution will be production ready I know BMW want hesitate to put it in production - for super light coupe (but not mid-engined!)."
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