i usually do all my own work but I was busy at the time so I had corona marine put a gimbal bearing, u-joints , and bellows in my boat. A year later here I am with a destroyed drive. The bellows never sealed because the transom shield is no good. There is no way the bellows ever sealed which is why the u-joints failed at 3900rpm and exploded the drive. If they would have told me the transom shield was bad I would have replaced it at that time. My guess is they broke it during gimbal bearing replacement or while prying off the old bellows. Just towed the boat there and they told me to pound sand. Guess I'm pulling the engine and complete drive.