OOooo ek. Now is the time to treat it fella! The FTO i have just done caught it spot on.Aye! My 155 suffers from the splitting mastic along the sill seams which starts the whole process of decay..
My interim 145 is pretty sound.. but I can already see signs of identical problems, seeing as it's 4 years younger than the 155. The inside of the sills and the drain holes under the seats is where it's all kicking off.