I looked at that boat" Eddystone Light" a couple of weeks ago... port topsides from chain plate
area forward to bow is soft! basicly the boat
needs to be re- built from the boot strip to the deck
from the chain plate
area( mid-ship) all the way forward to the bow area. If the hull
was sound I was going to put a deposit on it. I invested in a moisture meter and find its a great tool for a basic evaluation on these older balsa cored boats. I have looked at four C&C
40's in the last month and none are fitting the bill. Kind of sad because its such a great boat. Saw one in Stanford,CT this week and had saturation all over, maybe ok for coastal work
but nothing more. Many of these boats were raced very hard in the 80's and put away wet so to say. May have also had hard groundings that may not have been repaired properly so the keels show big cracks in the leading edge.
Good luck in your search.. after talking to some very reputable surveyors sold glass hulls may be the way to go on old 25-30 year old boat. The 40 has such great lines and sailing ability but kind of think the good examples may be few and far between!