I have an Idylle 11.5 built in France. Can anyone tell me what method of Keel bolt fastening was used? Were they cast in place in the keel, or tapped thru the bilge? The nuts (or heads) and washers are badly rusted and I want to pull one or two to inspect the bolts, but I don't know what method was used and I don't want to shear the bolt if it was cast in place or thru bolted to the bottom of the keel. Has anyone had success in replacing their Keel Bolts? If so could you share your war story. Thanks, Jerry West Wind