Here is a link to an APU start-up using the awesome FlyJsim 732, SIOC, Pokeys 57 and FSSymphony.
Notice the Amps gauge change with load. Pretty cool! 12bit PWM driving gauges.
https://www.youtube.com/watch?v=krXHaCEi1vM
http://www.cockpitbuilders.com/commu...ify_inline.gif