Can anyone share with me experiences with Alden Caravelle Rudders or construction details? I have a at lease two areas where if you tap with a small hammer or just your fist reveal to be hollow 6” to 8” diameter. I assume it has delaminated internally in these areas? What have others experienced with the UK/Danish built boats, I assume the Challenger rudder while a different shape rudder may have of had similar issues? It does not appear that my rudder is flooding while in for the season. This was found on my prepurchase survey 5 years ago, nothing has changed since then. However, prior to future Bermuda races over the next years I do plan to drop the rudder and open it up. Look forward to hearing from you. Thanks Lloyd