I glued the side sections to the fire wall as per the instructions. I'm using a great planes engine mount for a super tiger 40. I expected to have a small gap between the mount and the fuselage sides, but there is next to none. Some older designs had a maple or plywood engine rails with glued to the fuselage sides and had some of the vibration absorbed by the fuselage. Could I expect some vibration problems with the current setup or I shouldn't worry about it.