Report as inappropriate

Hi, this is a really good deign and quite beautiful,I like it.
I am printing the hull part using hull_back_190, hull_bow_89 and hull_middle_180. I met some problems.Is the hull_bow all solid and hull_interface all solid? Or they are almost solid? They are very heavy compared to the hull_back part.And the hull_middle_180 is also very heavy, weighs 880 grams in Cura. This is too heavy for a little boat.
Maybe somewhere is wrong that I don't know.I tried to edit them with 123D but failed.Really appreciate it if you could help me. Thank you.