This is just a quick example of how this sound could be used, what do you guys think? mechanical enough without being too heavy. once its sat in the soundscape i think it will sound pretty cool. 

MOTOR FOR TANK EXAMPLE

This tester plays through; four command sounds, mini gun spin up and minigun shooting (loop), Engine/Motor (loop)

TESTER TANK

GUI EXAMPLE

This tester is made up of three sounds, a statup sound, loopable engine, and shutoff sound

SPITFIRE TESTER

Some Tank Deaths, i think they sound suitably robotic and epic, let me know what you guys think

JackLeFevre