Balsa sandwich and vents

The balsa sandwich had rotted on one side of the roof and on the doors. I raked out the debris with a length of wire and filled with foam. The foam comes in an aerosol can with a useful extension tube so it is possible to get it right inside. The cabin vents were cracked and I could not find any 80 mm replacements, they only seem to come in 100 mm now. Luckily for me the previous owner Pat Lee has bought some, which he had not fitted, some time earlier. Pat has kindly sent them to me without charge. Pat is a nice man and I am sure if he lived near me we would be friends.