I've also built various two-wheeled balancing robots which, so I thought it was time to combine the two and make a one-wheel balancing robot, which can also stand still on the spot.

The robot measures 392 x 420 x 845 mm (15.4 x 16.5 x 33.3 in), tips the scales at around 20 kg (44 lb), and appears to ship in standard and education editions in a sturdy flight case.