The unique hand wheel handle design allows easy turning of the pot and dumping of materials.

A flat tyre 10 miles beyond Mount Barnett Roadhouse, a cross-threaded wheel nut, a dodgy jack handle, a dubious spare and a temperature of 100F (38C) had made for a taxing last couple of hours.

While driven wheel capabilities can also handle fabric, they lack the ability to handle even uncomplicated shapes that have tight corners, such as some flags and even only tabs.