Dont know about the second generator. The ADF Squirrels were AUW weight restricted following upgrade to BA wieghts and a HYD off bingle. I think the intent of Augusta was two fold: make the Koala as similar as possible as the twins to save on components, and set the Koala up way in front of any competition for certification if SE IFR became a reality in the US.
MPT, NVG is no substitute for IFR in any sense of the usage, nor is inadvertent IMC more likely on NVG, it is less likely. That said, an autopilot system was a reccomendation from the NVFR Mackay accident investigation, even though they identified no conclusive cause. Additionally, an autopilot is an excellent risk mitigation tool for night EMS and should be encouraged. As should NVG.
Back to the 120: anyone know of other engine failures in this type?