For those that have Scorpio, are you sure it is a battery back-up or is it trully a capacitor. The diference is amount of time the alarm is effective once the power wire is cut. Batteries allow for siren sounding and security functions for hours in comparison to seconds with a capacitor.
I have dissasembled many alarms in my education on security systems, therfore, I wouldn't install a Scorpio on my bike. Like mentioned previously, Scorpio support is also less then desirable.