Clark TK-22 with Benedini TBS-Mini and Turnigy 9x:
http://www.youtube.com/watch?feature=player_embedded&v=v6V0apFjI54
The Benedini is set up with some edited ElMod sounds, manually activated by the 3-position switch. (The elevation sound is a repeating chain squeak.) Driving the tank is more like a performance than any of my other setups, so it's a lot of fun.