Well after the motor was removed, we decided to remove some of the glass around the cracks to determine why it was cracking in the first place. Well, the transom had been previously repaired, but not too well! There was little glass matting used and its place, lots of Automotive bog. The transom had been raised about an inch by the use of hardwood blocking. An additional piece of ply had been added to the transom but was completely rotten. Still trying to decide whether to keep the original transom or install a new sheet of marine ply.