I've got a '77 and '78 Mirage 26 on my shortlist. I'm inspecting the '77 on Saturday afternoon and kinda hoping to pick your collective brains. Is the keel lead or steel?Is the rudder foam or wood core?Is the hull solid or wood core?I've got Don Casey's "Inspecting the Aging Sailboat" for generalities but would like to know if there's anything model specific I should watch out for. These boats are 30 years old now so I'm hoping problem areas would be generally well known. Unfortunately, there's not a lot of info on the web about them. I think these came with the OMC saildrive but they now have outboards.Thanks for any hints, tips or information you can supply.Brian Scott