I somehow lost a reply here many hours ago... Basically same as smallwheeler, the rear triangle will be more straight forward. I don't have the necessary engineering skills to design it strong enough for a B/M copy.
That folder is awesome! Looks like they found some Brompton hinges to use or something...
Also, with such a rear triangle it could swing under and become a bit smaller.
the most simple frame of moulton, in my opinion, is the track bike. no suspension. simple rear triangle.
