If there was any problem with the hulls they sure are few are far between as this builder
really knew what they were doing.
I would not worry about a cored hull
from a good builder
as long as it passes a good survey
from someone who knows what they are doing. My Tartan had a cored hull
and it was an excellent offshore
boat with very few problems and I don't think it has effected the sales side of it at all. I like the strength that comes with sandwich construction, its doesn't sweat and its a bit quieter as well and it sure beats a solid hull when it comes to impact resistance. It costs more to do it properly of course but you will see many well built boats with cored hulls not withstanding almost all multi hulls.