All of my engines are soft mounted, up to 100cc. Vibration to the radio/airframeis nearly eliminated in my set-ups. I realize my stuff is more advanced than sport stuff; I always soft mount the CDI too. Perhaps I should have made that distinction up front to avoid confusion.

Having said that, there is NO reason sport planes couldn't benefit from proper soft mounting of the smaller gassies. These are add on devicesbut are not heavy at about 2-4 ozs depending on size. I typically use carbon balsa laminated firewalls instead of heavy ply which often completelyoffsets the weight added.

The TECHAEROIBEC is optically isolated from the radio