Remote Control - Wireless Trigger (2-Relay) (FrightProps.com)
I installed a lazy susan bearing where the mannequin would go. I did not use the mannequin head. A rod connected to a servo is used to turn the mannequin head. The fingers were cut from the mannequin hands and servos are used to emulate the Stormtrooper typing. The controller had 2 built in servo channels but I had some issues with them so I bought a DMX to RC converter board. The controller also has a fully programmable DMX output and with the DMC to RC board I was able to obtain additional servo channels.
Instructional documents and movies for the Stormtrooper construction