According to Mr. McC there will be no front disc . . . yet . . .
Winzip dual disc pad brake looks 'humongous'! Also showed a one-of (so far) EXOgrid (not Isogrid) Dual Moto.
Calfee had 'Open Frame' design (no lateral) . . . nice! + a Bamboo (yes, bamboo!) frame/fork rideable 'woodie' prototype tandem.

Pedal on TWOgether!
Rudy and Kay/zonatandem