Also for me Moi3D is sufficiently good if you know how use, the SubD, Moi3D gave me now the possibility to make complex hulls, that I can edit and make these better inside Moi3d in less time, but I have an experience in both type of software Nurbs CAD and mesh modelling such as sub-div software, I can also predict dimensions of surfaces also diameters and for me is a dream this bridge between these worlds not only for organics types, because often is very harder obtaining a Nurbs shapes with surface continuity in a CAD modeler.
these images are all converted from subdiv geometry, edited inside Moi3D in various mode with boolean and surfaces joined and made them solid.