I would have put this in the Regulation Filing thread, but it's locked. I remember a discussion about what the fourth engineering component would be and this is from the SEC filings and may give us a hint.
"With each progressive step in our development, we have experienced a surge in
reservations. In addition, as we achieve subsequent milestones in the development of
the Elio
, customer confidence increases. Accordingly,
we expect to see surges in reservations as the following milestones are achieved and announced:
1. completion of prototypes,
2. testing results,
3. confirmation of mileage,
4. guarantee of the sales price,
5. hiring at the manufacturing facility, and, hopefully before production commences,
6. scarcity."
Enumeration, Bolding and Underlining mine.
"With each progressive step in our development, we have experienced a surge in
reservations. In addition, as we achieve subsequent milestones in the development of
the Elio
, customer confidence increases. Accordingly,
we expect to see surges in reservations as the following milestones are achieved and announced:
1. completion of prototypes,
2. testing results,
3. confirmation of mileage,
4. guarantee of the sales price,
5. hiring at the manufacturing facility, and, hopefully before production commences,
6. scarcity."
Enumeration, Bolding and Underlining mine.