The flexible motor mount supplied in the kit would hold the lugs on my engine approx 2.5mm clear of the ply plate.

The aluminium rails are only 2mm thick. However when I dry fitted the arrangement the spinner was a nice fit to the front of thefuselage.

The way I see it the main strengthening lies in the member glued across the engine room, making a stiffer connection between the engine support and the fuse.

I am not mechanically skilled, and perhaps hard mounting is not that wise. But I believe that even a flexible mount needs to have a solid support to be able to work properly.

Helge.