Hi, I plan to change charger, to charger-inverter on my Bavaria 39 Cruiser sailboat, original charger seems to be screwed directly to hull, or is there some additional layer of wood lamineted? New charger inverter is 20kg and I dont like idea of screwing it directly to hull... Do You know if it is safe to screw it in the place of old one? I was thinking about making some wooden frame, but still I would need to attach it somehow to hull (probably laminate it).