The UniSA prototype used an aftermarket seat for the driver. This seat slides fore and aft to adjust leg room, and tilts forwards to allow access to the rear.
The mass of aftermarket seats varies significantly; it is important to find one with low mass.
The rear seat is formed from the rear of the tub chassis. The prototype does not have a proper back seat—the intent was to cushion and upholster the rear seat section of the tub structure.