Excellent to work with, good sound insulation, Alubutyl glued underneath as a heavy mat. TOP
Have the foam in 40mm and where it is not otherwise Gin in 25 mm thickness used. The first layer of AluButhyl is glued onto the wood as a heavy layer, the foam boards above it with the special adhesive (such as Pattex). Finally, aluminum foil from the saunas. With new engine bearings, the engine is felt in the cockpit by half the quieter. Foam is very stable and can be cut well. No grief. You have to be very careful not to leave \ "windows \" for the sound. Completely glued on the edges and edges brings good results. Good buy.