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There are two issues with this though:

1. Often, I would like to provide MoI with only a point as the “tip” of the shape, but that does not seem to work then as MoI ignores the point and does not consider it to be a surface..
2. Sometimes, the fuselage part is made of several sub-parts(and thus as many edges) even though it was generated in one go by the program (this is probably due to curvature I guess). In that case, I do not seem to be able to use Blend versus a shape that does not have similar sub-parts (say a 4-part semi-cylinder and a flat cap). I can extract the edge of the first part and join the parts, but then I have only a curve, not the surface from which to draw continuity.

Hi Jean-Paul,

This is just a thought...can you use the *rebuild* script on your build curves so than you can generate a single surface rather than polysurfaces?
It usually works for me when I'm working on a model where I don't care if I don't have totally sharp edges. They still look pretty sharp but have
a nearly imperceptible roundness on the edges and corners due to rebuilding the curves from which they were generated..

Jesse

>This is just a thought...can you use the *rebuild* script on your build curves so than you can generate a single surface rather than polysurfaces?
It usually works for me when I'm working on a model where I don't care if I don't have totally sharp edges. They still look pretty sharp but have
a nearly imperceptible roundness on the edges and corners due to rebuilding the curves from which they were generated..

I've used that trick. It is the sharp corners that seem to split a single network into more than one surface. At times I've used quite a lot of points in my curve to make it look sharp when it really isn't. I've also found it is possible to add a point and then drag it to where I want the sharp bit to be.