I am currently doing the hull of a WWII warship for model kit maker. I have layed out about 50 different contours, but am having difficulty when it comes to areas that require more than one surface at the rear of the hull. I can't get the edges to trim properly, but I think that is because I can't get the surfaces to be tangent to each other. I have one large surface loft representing about 80% of the hull, but near the rear the propeller hub is making me miserable. I am having to add in a ton of different surfaces and none of them are tangent to each other. If someone could give me a few pointers as to what I should be doing instead of what I did, I would really appreciate it.