Is it possible to use nida-core for a very light hull on a 49ft river cruiser. Trying to build as light as possible, use very small Diesel engine for economy. I read on a different forum a poster said he thought he could build a cored 60ft boat that would weigh in about 8 to 10k lbs. I don't think it's possible, but I want to get as close as possible to that figure.