Very interesting approach to insulating the boat from portable generator vibration and noise - haven't seen that before. If you could post a photo there might be bonus points in it for you

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Also very interested in hearing about your experience with the WhisperGen 3500. That is exactly the generator I considered getting installed in my H36 in the port cockpit locker, where Hunter made room for a Panda install by dealers (a few folks that frequent these discussions have them on their 36-38 foot Hunters). Curious why you chose to install yours in the salon? The WhisperGen is supposed to be a more "advanced" generation of marine generators, and while certainly gaining no advantage in price over its competitors, it seemed to have some advantages in noise and efficiency. Having found virtually no one who had them installed or even tested independently I have only the manufacturer's literature to go on. I may reach out to you separately to discuss your experience.