This model added extra power (89 hp) and four body designs on a common chassis.

Starting in 2012, the models have added additional roles, owing to Carey's want to expand their role on the show.

Later models added 22 bit addressing, allowing a theoretical 4Mword maximum memory.

Later models added vertical stabilization to make firing on the move practical.

The 2011 model added wireless (802.11) and an improved screen.

A pricier model might just have added features that have nothing to do with safety.

In its last year, the model "20" added a touring car.

The most extreme models also add an outside layer of bulletproof plastic.

The 1.6 model also added central locking and front electric windows to the list.

All other models add a center 2nd-row seat for 8-passenger capacity.